| File: | clang/lib/CodeGen/CGObjC.cpp |
| Warning: | line 492, column 35 Called C++ object pointer is null |
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| 1 | //===---- CGObjC.cpp - Emit LLVM Code for Objective-C ---------------------===// | ||||||||
| 2 | // | ||||||||
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||||
| 4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||||
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||||
| 6 | // | ||||||||
| 7 | //===----------------------------------------------------------------------===// | ||||||||
| 8 | // | ||||||||
| 9 | // This contains code to emit Objective-C code as LLVM code. | ||||||||
| 10 | // | ||||||||
| 11 | //===----------------------------------------------------------------------===// | ||||||||
| 12 | |||||||||
| 13 | #include "CGDebugInfo.h" | ||||||||
| 14 | #include "CGObjCRuntime.h" | ||||||||
| 15 | #include "CodeGenFunction.h" | ||||||||
| 16 | #include "CodeGenModule.h" | ||||||||
| 17 | #include "ConstantEmitter.h" | ||||||||
| 18 | #include "TargetInfo.h" | ||||||||
| 19 | #include "clang/AST/ASTContext.h" | ||||||||
| 20 | #include "clang/AST/Attr.h" | ||||||||
| 21 | #include "clang/AST/DeclObjC.h" | ||||||||
| 22 | #include "clang/AST/StmtObjC.h" | ||||||||
| 23 | #include "clang/Basic/Diagnostic.h" | ||||||||
| 24 | #include "clang/CodeGen/CGFunctionInfo.h" | ||||||||
| 25 | #include "llvm/ADT/STLExtras.h" | ||||||||
| 26 | #include "llvm/IR/DataLayout.h" | ||||||||
| 27 | #include "llvm/IR/InlineAsm.h" | ||||||||
| 28 | using namespace clang; | ||||||||
| 29 | using namespace CodeGen; | ||||||||
| 30 | |||||||||
| 31 | typedef llvm::PointerIntPair<llvm::Value*,1,bool> TryEmitResult; | ||||||||
| 32 | static TryEmitResult | ||||||||
| 33 | tryEmitARCRetainScalarExpr(CodeGenFunction &CGF, const Expr *e); | ||||||||
| 34 | static RValue AdjustObjCObjectType(CodeGenFunction &CGF, | ||||||||
| 35 | QualType ET, | ||||||||
| 36 | RValue Result); | ||||||||
| 37 | |||||||||
| 38 | /// Given the address of a variable of pointer type, find the correct | ||||||||
| 39 | /// null to store into it. | ||||||||
| 40 | static llvm::Constant *getNullForVariable(Address addr) { | ||||||||
| 41 | llvm::Type *type = addr.getElementType(); | ||||||||
| 42 | return llvm::ConstantPointerNull::get(cast<llvm::PointerType>(type)); | ||||||||
| 43 | } | ||||||||
| 44 | |||||||||
| 45 | /// Emits an instance of NSConstantString representing the object. | ||||||||
| 46 | llvm::Value *CodeGenFunction::EmitObjCStringLiteral(const ObjCStringLiteral *E) | ||||||||
| 47 | { | ||||||||
| 48 | llvm::Constant *C = | ||||||||
| 49 | CGM.getObjCRuntime().GenerateConstantString(E->getString()).getPointer(); | ||||||||
| 50 | // FIXME: This bitcast should just be made an invariant on the Runtime. | ||||||||
| 51 | return llvm::ConstantExpr::getBitCast(C, ConvertType(E->getType())); | ||||||||
| 52 | } | ||||||||
| 53 | |||||||||
| 54 | /// EmitObjCBoxedExpr - This routine generates code to call | ||||||||
| 55 | /// the appropriate expression boxing method. This will either be | ||||||||
| 56 | /// one of +[NSNumber numberWith<Type>:], or +[NSString stringWithUTF8String:], | ||||||||
| 57 | /// or [NSValue valueWithBytes:objCType:]. | ||||||||
| 58 | /// | ||||||||
| 59 | llvm::Value * | ||||||||
| 60 | CodeGenFunction::EmitObjCBoxedExpr(const ObjCBoxedExpr *E) { | ||||||||
| 61 | // Generate the correct selector for this literal's concrete type. | ||||||||
| 62 | // Get the method. | ||||||||
| 63 | const ObjCMethodDecl *BoxingMethod = E->getBoxingMethod(); | ||||||||
| 64 | const Expr *SubExpr = E->getSubExpr(); | ||||||||
| 65 | |||||||||
| 66 | if (E->isExpressibleAsConstantInitializer()) { | ||||||||
| 67 | ConstantEmitter ConstEmitter(CGM); | ||||||||
| 68 | return ConstEmitter.tryEmitAbstract(E, E->getType()); | ||||||||
| 69 | } | ||||||||
| 70 | |||||||||
| 71 | assert(BoxingMethod->isClassMethod() && "BoxingMethod must be a class method")((BoxingMethod->isClassMethod() && "BoxingMethod must be a class method" ) ? static_cast<void> (0) : __assert_fail ("BoxingMethod->isClassMethod() && \"BoxingMethod must be a class method\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 71, __PRETTY_FUNCTION__)); | ||||||||
| 72 | Selector Sel = BoxingMethod->getSelector(); | ||||||||
| 73 | |||||||||
| 74 | // Generate a reference to the class pointer, which will be the receiver. | ||||||||
| 75 | // Assumes that the method was introduced in the class that should be | ||||||||
| 76 | // messaged (avoids pulling it out of the result type). | ||||||||
| 77 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); | ||||||||
| 78 | const ObjCInterfaceDecl *ClassDecl = BoxingMethod->getClassInterface(); | ||||||||
| 79 | llvm::Value *Receiver = Runtime.GetClass(*this, ClassDecl); | ||||||||
| 80 | |||||||||
| 81 | CallArgList Args; | ||||||||
| 82 | const ParmVarDecl *ArgDecl = *BoxingMethod->param_begin(); | ||||||||
| 83 | QualType ArgQT = ArgDecl->getType().getUnqualifiedType(); | ||||||||
| 84 | |||||||||
| 85 | // ObjCBoxedExpr supports boxing of structs and unions | ||||||||
| 86 | // via [NSValue valueWithBytes:objCType:] | ||||||||
| 87 | const QualType ValueType(SubExpr->getType().getCanonicalType()); | ||||||||
| 88 | if (ValueType->isObjCBoxableRecordType()) { | ||||||||
| 89 | // Emit CodeGen for first parameter | ||||||||
| 90 | // and cast value to correct type | ||||||||
| 91 | Address Temporary = CreateMemTemp(SubExpr->getType()); | ||||||||
| 92 | EmitAnyExprToMem(SubExpr, Temporary, Qualifiers(), /*isInit*/ true); | ||||||||
| 93 | Address BitCast = Builder.CreateBitCast(Temporary, ConvertType(ArgQT)); | ||||||||
| 94 | Args.add(RValue::get(BitCast.getPointer()), ArgQT); | ||||||||
| 95 | |||||||||
| 96 | // Create char array to store type encoding | ||||||||
| 97 | std::string Str; | ||||||||
| 98 | getContext().getObjCEncodingForType(ValueType, Str); | ||||||||
| 99 | llvm::Constant *GV = CGM.GetAddrOfConstantCString(Str).getPointer(); | ||||||||
| 100 | |||||||||
| 101 | // Cast type encoding to correct type | ||||||||
| 102 | const ParmVarDecl *EncodingDecl = BoxingMethod->parameters()[1]; | ||||||||
| 103 | QualType EncodingQT = EncodingDecl->getType().getUnqualifiedType(); | ||||||||
| 104 | llvm::Value *Cast = Builder.CreateBitCast(GV, ConvertType(EncodingQT)); | ||||||||
| 105 | |||||||||
| 106 | Args.add(RValue::get(Cast), EncodingQT); | ||||||||
| 107 | } else { | ||||||||
| 108 | Args.add(EmitAnyExpr(SubExpr), ArgQT); | ||||||||
| 109 | } | ||||||||
| 110 | |||||||||
| 111 | RValue result = Runtime.GenerateMessageSend( | ||||||||
| 112 | *this, ReturnValueSlot(), BoxingMethod->getReturnType(), Sel, Receiver, | ||||||||
| 113 | Args, ClassDecl, BoxingMethod); | ||||||||
| 114 | return Builder.CreateBitCast(result.getScalarVal(), | ||||||||
| 115 | ConvertType(E->getType())); | ||||||||
| 116 | } | ||||||||
| 117 | |||||||||
| 118 | llvm::Value *CodeGenFunction::EmitObjCCollectionLiteral(const Expr *E, | ||||||||
| 119 | const ObjCMethodDecl *MethodWithObjects) { | ||||||||
| 120 | ASTContext &Context = CGM.getContext(); | ||||||||
| 121 | const ObjCDictionaryLiteral *DLE = nullptr; | ||||||||
| 122 | const ObjCArrayLiteral *ALE = dyn_cast<ObjCArrayLiteral>(E); | ||||||||
| 123 | if (!ALE) | ||||||||
| 124 | DLE = cast<ObjCDictionaryLiteral>(E); | ||||||||
| 125 | |||||||||
| 126 | // Optimize empty collections by referencing constants, when available. | ||||||||
| 127 | uint64_t NumElements = | ||||||||
| 128 | ALE ? ALE->getNumElements() : DLE->getNumElements(); | ||||||||
| 129 | if (NumElements == 0 && CGM.getLangOpts().ObjCRuntime.hasEmptyCollections()) { | ||||||||
| 130 | StringRef ConstantName = ALE ? "__NSArray0__" : "__NSDictionary0__"; | ||||||||
| 131 | QualType IdTy(CGM.getContext().getObjCIdType()); | ||||||||
| 132 | llvm::Constant *Constant = | ||||||||
| 133 | CGM.CreateRuntimeVariable(ConvertType(IdTy), ConstantName); | ||||||||
| 134 | LValue LV = MakeNaturalAlignAddrLValue(Constant, IdTy); | ||||||||
| 135 | llvm::Value *Ptr = EmitLoadOfScalar(LV, E->getBeginLoc()); | ||||||||
| 136 | cast<llvm::LoadInst>(Ptr)->setMetadata( | ||||||||
| 137 | CGM.getModule().getMDKindID("invariant.load"), | ||||||||
| 138 | llvm::MDNode::get(getLLVMContext(), None)); | ||||||||
| 139 | return Builder.CreateBitCast(Ptr, ConvertType(E->getType())); | ||||||||
| 140 | } | ||||||||
| 141 | |||||||||
| 142 | // Compute the type of the array we're initializing. | ||||||||
| 143 | llvm::APInt APNumElements(Context.getTypeSize(Context.getSizeType()), | ||||||||
| 144 | NumElements); | ||||||||
| 145 | QualType ElementType = Context.getObjCIdType().withConst(); | ||||||||
| 146 | QualType ElementArrayType | ||||||||
| 147 | = Context.getConstantArrayType(ElementType, APNumElements, nullptr, | ||||||||
| 148 | ArrayType::Normal, /*IndexTypeQuals=*/0); | ||||||||
| 149 | |||||||||
| 150 | // Allocate the temporary array(s). | ||||||||
| 151 | Address Objects = CreateMemTemp(ElementArrayType, "objects"); | ||||||||
| 152 | Address Keys = Address::invalid(); | ||||||||
| 153 | if (DLE) | ||||||||
| 154 | Keys = CreateMemTemp(ElementArrayType, "keys"); | ||||||||
| 155 | |||||||||
| 156 | // In ARC, we may need to do extra work to keep all the keys and | ||||||||
| 157 | // values alive until after the call. | ||||||||
| 158 | SmallVector<llvm::Value *, 16> NeededObjects; | ||||||||
| 159 | bool TrackNeededObjects = | ||||||||
| 160 | (getLangOpts().ObjCAutoRefCount && | ||||||||
| 161 | CGM.getCodeGenOpts().OptimizationLevel != 0); | ||||||||
| 162 | |||||||||
| 163 | // Perform the actual initialialization of the array(s). | ||||||||
| 164 | for (uint64_t i = 0; i < NumElements; i++) { | ||||||||
| 165 | if (ALE) { | ||||||||
| 166 | // Emit the element and store it to the appropriate array slot. | ||||||||
| 167 | const Expr *Rhs = ALE->getElement(i); | ||||||||
| 168 | LValue LV = MakeAddrLValue(Builder.CreateConstArrayGEP(Objects, i), | ||||||||
| 169 | ElementType, AlignmentSource::Decl); | ||||||||
| 170 | |||||||||
| 171 | llvm::Value *value = EmitScalarExpr(Rhs); | ||||||||
| 172 | EmitStoreThroughLValue(RValue::get(value), LV, true); | ||||||||
| 173 | if (TrackNeededObjects) { | ||||||||
| 174 | NeededObjects.push_back(value); | ||||||||
| 175 | } | ||||||||
| 176 | } else { | ||||||||
| 177 | // Emit the key and store it to the appropriate array slot. | ||||||||
| 178 | const Expr *Key = DLE->getKeyValueElement(i).Key; | ||||||||
| 179 | LValue KeyLV = MakeAddrLValue(Builder.CreateConstArrayGEP(Keys, i), | ||||||||
| 180 | ElementType, AlignmentSource::Decl); | ||||||||
| 181 | llvm::Value *keyValue = EmitScalarExpr(Key); | ||||||||
| 182 | EmitStoreThroughLValue(RValue::get(keyValue), KeyLV, /*isInit=*/true); | ||||||||
| 183 | |||||||||
| 184 | // Emit the value and store it to the appropriate array slot. | ||||||||
| 185 | const Expr *Value = DLE->getKeyValueElement(i).Value; | ||||||||
| 186 | LValue ValueLV = MakeAddrLValue(Builder.CreateConstArrayGEP(Objects, i), | ||||||||
| 187 | ElementType, AlignmentSource::Decl); | ||||||||
| 188 | llvm::Value *valueValue = EmitScalarExpr(Value); | ||||||||
| 189 | EmitStoreThroughLValue(RValue::get(valueValue), ValueLV, /*isInit=*/true); | ||||||||
| 190 | if (TrackNeededObjects) { | ||||||||
| 191 | NeededObjects.push_back(keyValue); | ||||||||
| 192 | NeededObjects.push_back(valueValue); | ||||||||
| 193 | } | ||||||||
| 194 | } | ||||||||
| 195 | } | ||||||||
| 196 | |||||||||
| 197 | // Generate the argument list. | ||||||||
| 198 | CallArgList Args; | ||||||||
| 199 | ObjCMethodDecl::param_const_iterator PI = MethodWithObjects->param_begin(); | ||||||||
| 200 | const ParmVarDecl *argDecl = *PI++; | ||||||||
| 201 | QualType ArgQT = argDecl->getType().getUnqualifiedType(); | ||||||||
| 202 | Args.add(RValue::get(Objects.getPointer()), ArgQT); | ||||||||
| 203 | if (DLE) { | ||||||||
| 204 | argDecl = *PI++; | ||||||||
| 205 | ArgQT = argDecl->getType().getUnqualifiedType(); | ||||||||
| 206 | Args.add(RValue::get(Keys.getPointer()), ArgQT); | ||||||||
| 207 | } | ||||||||
| 208 | argDecl = *PI; | ||||||||
| 209 | ArgQT = argDecl->getType().getUnqualifiedType(); | ||||||||
| 210 | llvm::Value *Count = | ||||||||
| 211 | llvm::ConstantInt::get(CGM.getTypes().ConvertType(ArgQT), NumElements); | ||||||||
| 212 | Args.add(RValue::get(Count), ArgQT); | ||||||||
| 213 | |||||||||
| 214 | // Generate a reference to the class pointer, which will be the receiver. | ||||||||
| 215 | Selector Sel = MethodWithObjects->getSelector(); | ||||||||
| 216 | QualType ResultType = E->getType(); | ||||||||
| 217 | const ObjCObjectPointerType *InterfacePointerType | ||||||||
| 218 | = ResultType->getAsObjCInterfacePointerType(); | ||||||||
| 219 | ObjCInterfaceDecl *Class | ||||||||
| 220 | = InterfacePointerType->getObjectType()->getInterface(); | ||||||||
| 221 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); | ||||||||
| 222 | llvm::Value *Receiver = Runtime.GetClass(*this, Class); | ||||||||
| 223 | |||||||||
| 224 | // Generate the message send. | ||||||||
| 225 | RValue result = Runtime.GenerateMessageSend( | ||||||||
| 226 | *this, ReturnValueSlot(), MethodWithObjects->getReturnType(), Sel, | ||||||||
| 227 | Receiver, Args, Class, MethodWithObjects); | ||||||||
| 228 | |||||||||
| 229 | // The above message send needs these objects, but in ARC they are | ||||||||
| 230 | // passed in a buffer that is essentially __unsafe_unretained. | ||||||||
| 231 | // Therefore we must prevent the optimizer from releasing them until | ||||||||
| 232 | // after the call. | ||||||||
| 233 | if (TrackNeededObjects) { | ||||||||
| 234 | EmitARCIntrinsicUse(NeededObjects); | ||||||||
| 235 | } | ||||||||
| 236 | |||||||||
| 237 | return Builder.CreateBitCast(result.getScalarVal(), | ||||||||
| 238 | ConvertType(E->getType())); | ||||||||
| 239 | } | ||||||||
| 240 | |||||||||
| 241 | llvm::Value *CodeGenFunction::EmitObjCArrayLiteral(const ObjCArrayLiteral *E) { | ||||||||
| 242 | return EmitObjCCollectionLiteral(E, E->getArrayWithObjectsMethod()); | ||||||||
| 243 | } | ||||||||
| 244 | |||||||||
| 245 | llvm::Value *CodeGenFunction::EmitObjCDictionaryLiteral( | ||||||||
| 246 | const ObjCDictionaryLiteral *E) { | ||||||||
| 247 | return EmitObjCCollectionLiteral(E, E->getDictWithObjectsMethod()); | ||||||||
| 248 | } | ||||||||
| 249 | |||||||||
| 250 | /// Emit a selector. | ||||||||
| 251 | llvm::Value *CodeGenFunction::EmitObjCSelectorExpr(const ObjCSelectorExpr *E) { | ||||||||
| 252 | // Untyped selector. | ||||||||
| 253 | // Note that this implementation allows for non-constant strings to be passed | ||||||||
| 254 | // as arguments to @selector(). Currently, the only thing preventing this | ||||||||
| 255 | // behaviour is the type checking in the front end. | ||||||||
| 256 | return CGM.getObjCRuntime().GetSelector(*this, E->getSelector()); | ||||||||
| 257 | } | ||||||||
| 258 | |||||||||
| 259 | llvm::Value *CodeGenFunction::EmitObjCProtocolExpr(const ObjCProtocolExpr *E) { | ||||||||
| 260 | // FIXME: This should pass the Decl not the name. | ||||||||
| 261 | return CGM.getObjCRuntime().GenerateProtocolRef(*this, E->getProtocol()); | ||||||||
| 262 | } | ||||||||
| 263 | |||||||||
| 264 | /// Adjust the type of an Objective-C object that doesn't match up due | ||||||||
| 265 | /// to type erasure at various points, e.g., related result types or the use | ||||||||
| 266 | /// of parameterized classes. | ||||||||
| 267 | static RValue AdjustObjCObjectType(CodeGenFunction &CGF, QualType ExpT, | ||||||||
| 268 | RValue Result) { | ||||||||
| 269 | if (!ExpT->isObjCRetainableType()) | ||||||||
| 270 | return Result; | ||||||||
| 271 | |||||||||
| 272 | // If the converted types are the same, we're done. | ||||||||
| 273 | llvm::Type *ExpLLVMTy = CGF.ConvertType(ExpT); | ||||||||
| 274 | if (ExpLLVMTy == Result.getScalarVal()->getType()) | ||||||||
| 275 | return Result; | ||||||||
| 276 | |||||||||
| 277 | // We have applied a substitution. Cast the rvalue appropriately. | ||||||||
| 278 | return RValue::get(CGF.Builder.CreateBitCast(Result.getScalarVal(), | ||||||||
| 279 | ExpLLVMTy)); | ||||||||
| 280 | } | ||||||||
| 281 | |||||||||
| 282 | /// Decide whether to extend the lifetime of the receiver of a | ||||||||
| 283 | /// returns-inner-pointer message. | ||||||||
| 284 | static bool | ||||||||
| 285 | shouldExtendReceiverForInnerPointerMessage(const ObjCMessageExpr *message) { | ||||||||
| 286 | switch (message->getReceiverKind()) { | ||||||||
| 287 | |||||||||
| 288 | // For a normal instance message, we should extend unless the | ||||||||
| 289 | // receiver is loaded from a variable with precise lifetime. | ||||||||
| 290 | case ObjCMessageExpr::Instance: { | ||||||||
| 291 | const Expr *receiver = message->getInstanceReceiver(); | ||||||||
| 292 | |||||||||
| 293 | // Look through OVEs. | ||||||||
| 294 | if (auto opaque = dyn_cast<OpaqueValueExpr>(receiver)) { | ||||||||
| 295 | if (opaque->getSourceExpr()) | ||||||||
| 296 | receiver = opaque->getSourceExpr()->IgnoreParens(); | ||||||||
| 297 | } | ||||||||
| 298 | |||||||||
| 299 | const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(receiver); | ||||||||
| 300 | if (!ice || ice->getCastKind() != CK_LValueToRValue) return true; | ||||||||
| 301 | receiver = ice->getSubExpr()->IgnoreParens(); | ||||||||
| 302 | |||||||||
| 303 | // Look through OVEs. | ||||||||
| 304 | if (auto opaque = dyn_cast<OpaqueValueExpr>(receiver)) { | ||||||||
| 305 | if (opaque->getSourceExpr()) | ||||||||
| 306 | receiver = opaque->getSourceExpr()->IgnoreParens(); | ||||||||
| 307 | } | ||||||||
| 308 | |||||||||
| 309 | // Only __strong variables. | ||||||||
| 310 | if (receiver->getType().getObjCLifetime() != Qualifiers::OCL_Strong) | ||||||||
| 311 | return true; | ||||||||
| 312 | |||||||||
| 313 | // All ivars and fields have precise lifetime. | ||||||||
| 314 | if (isa<MemberExpr>(receiver) || isa<ObjCIvarRefExpr>(receiver)) | ||||||||
| 315 | return false; | ||||||||
| 316 | |||||||||
| 317 | // Otherwise, check for variables. | ||||||||
| 318 | const DeclRefExpr *declRef = dyn_cast<DeclRefExpr>(ice->getSubExpr()); | ||||||||
| 319 | if (!declRef) return true; | ||||||||
| 320 | const VarDecl *var = dyn_cast<VarDecl>(declRef->getDecl()); | ||||||||
| 321 | if (!var) return true; | ||||||||
| 322 | |||||||||
| 323 | // All variables have precise lifetime except local variables with | ||||||||
| 324 | // automatic storage duration that aren't specially marked. | ||||||||
| 325 | return (var->hasLocalStorage() && | ||||||||
| 326 | !var->hasAttr<ObjCPreciseLifetimeAttr>()); | ||||||||
| 327 | } | ||||||||
| 328 | |||||||||
| 329 | case ObjCMessageExpr::Class: | ||||||||
| 330 | case ObjCMessageExpr::SuperClass: | ||||||||
| 331 | // It's never necessary for class objects. | ||||||||
| 332 | return false; | ||||||||
| 333 | |||||||||
| 334 | case ObjCMessageExpr::SuperInstance: | ||||||||
| 335 | // We generally assume that 'self' lives throughout a method call. | ||||||||
| 336 | return false; | ||||||||
| 337 | } | ||||||||
| 338 | |||||||||
| 339 | llvm_unreachable("invalid receiver kind")::llvm::llvm_unreachable_internal("invalid receiver kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 339); | ||||||||
| 340 | } | ||||||||
| 341 | |||||||||
| 342 | /// Given an expression of ObjC pointer type, check whether it was | ||||||||
| 343 | /// immediately loaded from an ARC __weak l-value. | ||||||||
| 344 | static const Expr *findWeakLValue(const Expr *E) { | ||||||||
| 345 | assert(E->getType()->isObjCRetainableType())((E->getType()->isObjCRetainableType()) ? static_cast< void> (0) : __assert_fail ("E->getType()->isObjCRetainableType()" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 345, __PRETTY_FUNCTION__)); | ||||||||
| 346 | E = E->IgnoreParens(); | ||||||||
| 347 | if (auto CE = dyn_cast<CastExpr>(E)) { | ||||||||
| 348 | if (CE->getCastKind() == CK_LValueToRValue) { | ||||||||
| 349 | if (CE->getSubExpr()->getType().getObjCLifetime() == Qualifiers::OCL_Weak) | ||||||||
| 350 | return CE->getSubExpr(); | ||||||||
| 351 | } | ||||||||
| 352 | } | ||||||||
| 353 | |||||||||
| 354 | return nullptr; | ||||||||
| 355 | } | ||||||||
| 356 | |||||||||
| 357 | /// The ObjC runtime may provide entrypoints that are likely to be faster | ||||||||
| 358 | /// than an ordinary message send of the appropriate selector. | ||||||||
| 359 | /// | ||||||||
| 360 | /// The entrypoints are guaranteed to be equivalent to just sending the | ||||||||
| 361 | /// corresponding message. If the entrypoint is implemented naively as just a | ||||||||
| 362 | /// message send, using it is a trade-off: it sacrifices a few cycles of | ||||||||
| 363 | /// overhead to save a small amount of code. However, it's possible for | ||||||||
| 364 | /// runtimes to detect and special-case classes that use "standard" | ||||||||
| 365 | /// behavior; if that's dynamically a large proportion of all objects, using | ||||||||
| 366 | /// the entrypoint will also be faster than using a message send. | ||||||||
| 367 | /// | ||||||||
| 368 | /// If the runtime does support a required entrypoint, then this method will | ||||||||
| 369 | /// generate a call and return the resulting value. Otherwise it will return | ||||||||
| 370 | /// None and the caller can generate a msgSend instead. | ||||||||
| 371 | static Optional<llvm::Value *> | ||||||||
| 372 | tryGenerateSpecializedMessageSend(CodeGenFunction &CGF, QualType ResultType, | ||||||||
| 373 | llvm::Value *Receiver, | ||||||||
| 374 | const CallArgList& Args, Selector Sel, | ||||||||
| 375 | const ObjCMethodDecl *method, | ||||||||
| 376 | bool isClassMessage) { | ||||||||
| 377 | auto &CGM = CGF.CGM; | ||||||||
| 378 | if (!CGM.getCodeGenOpts().ObjCConvertMessagesToRuntimeCalls) | ||||||||
| 379 | return None; | ||||||||
| 380 | |||||||||
| 381 | auto &Runtime = CGM.getLangOpts().ObjCRuntime; | ||||||||
| 382 | switch (Sel.getMethodFamily()) { | ||||||||
| 383 | case OMF_alloc: | ||||||||
| 384 | if (isClassMessage && | ||||||||
| 385 | Runtime.shouldUseRuntimeFunctionsForAlloc() && | ||||||||
| 386 | ResultType->isObjCObjectPointerType()) { | ||||||||
| 387 | // [Foo alloc] -> objc_alloc(Foo) or | ||||||||
| 388 | // [self alloc] -> objc_alloc(self) | ||||||||
| 389 | if (Sel.isUnarySelector() && Sel.getNameForSlot(0) == "alloc") | ||||||||
| 390 | return CGF.EmitObjCAlloc(Receiver, CGF.ConvertType(ResultType)); | ||||||||
| 391 | // [Foo allocWithZone:nil] -> objc_allocWithZone(Foo) or | ||||||||
| 392 | // [self allocWithZone:nil] -> objc_allocWithZone(self) | ||||||||
| 393 | if (Sel.isKeywordSelector() && Sel.getNumArgs() == 1 && | ||||||||
| 394 | Args.size() == 1 && Args.front().getType()->isPointerType() && | ||||||||
| 395 | Sel.getNameForSlot(0) == "allocWithZone") { | ||||||||
| 396 | const llvm::Value* arg = Args.front().getKnownRValue().getScalarVal(); | ||||||||
| 397 | if (isa<llvm::ConstantPointerNull>(arg)) | ||||||||
| 398 | return CGF.EmitObjCAllocWithZone(Receiver, | ||||||||
| 399 | CGF.ConvertType(ResultType)); | ||||||||
| 400 | return None; | ||||||||
| 401 | } | ||||||||
| 402 | } | ||||||||
| 403 | break; | ||||||||
| 404 | |||||||||
| 405 | case OMF_autorelease: | ||||||||
| 406 | if (ResultType->isObjCObjectPointerType() && | ||||||||
| 407 | CGM.getLangOpts().getGC() == LangOptions::NonGC && | ||||||||
| 408 | Runtime.shouldUseARCFunctionsForRetainRelease()) | ||||||||
| 409 | return CGF.EmitObjCAutorelease(Receiver, CGF.ConvertType(ResultType)); | ||||||||
| 410 | break; | ||||||||
| 411 | |||||||||
| 412 | case OMF_retain: | ||||||||
| 413 | if (ResultType->isObjCObjectPointerType() && | ||||||||
| 414 | CGM.getLangOpts().getGC() == LangOptions::NonGC && | ||||||||
| 415 | Runtime.shouldUseARCFunctionsForRetainRelease()) | ||||||||
| 416 | return CGF.EmitObjCRetainNonBlock(Receiver, CGF.ConvertType(ResultType)); | ||||||||
| 417 | break; | ||||||||
| 418 | |||||||||
| 419 | case OMF_release: | ||||||||
| 420 | if (ResultType->isVoidType() && | ||||||||
| 421 | CGM.getLangOpts().getGC() == LangOptions::NonGC && | ||||||||
| 422 | Runtime.shouldUseARCFunctionsForRetainRelease()) { | ||||||||
| 423 | CGF.EmitObjCRelease(Receiver, ARCPreciseLifetime); | ||||||||
| 424 | return nullptr; | ||||||||
| 425 | } | ||||||||
| 426 | break; | ||||||||
| 427 | |||||||||
| 428 | default: | ||||||||
| 429 | break; | ||||||||
| 430 | } | ||||||||
| 431 | return None; | ||||||||
| 432 | } | ||||||||
| 433 | |||||||||
| 434 | CodeGen::RValue CGObjCRuntime::GeneratePossiblySpecializedMessageSend( | ||||||||
| 435 | CodeGenFunction &CGF, ReturnValueSlot Return, QualType ResultType, | ||||||||
| 436 | Selector Sel, llvm::Value *Receiver, const CallArgList &Args, | ||||||||
| 437 | const ObjCInterfaceDecl *OID, const ObjCMethodDecl *Method, | ||||||||
| 438 | bool isClassMessage) { | ||||||||
| 439 | if (Optional<llvm::Value *> SpecializedResult = | ||||||||
| 440 | tryGenerateSpecializedMessageSend(CGF, ResultType, Receiver, Args, | ||||||||
| 441 | Sel, Method, isClassMessage)) { | ||||||||
| 442 | return RValue::get(SpecializedResult.getValue()); | ||||||||
| 443 | } | ||||||||
| 444 | return GenerateMessageSend(CGF, Return, ResultType, Sel, Receiver, Args, OID, | ||||||||
| 445 | Method); | ||||||||
| 446 | } | ||||||||
| 447 | |||||||||
| 448 | /// Instead of '[[MyClass alloc] init]', try to generate | ||||||||
| 449 | /// 'objc_alloc_init(MyClass)'. This provides a code size improvement on the | ||||||||
| 450 | /// caller side, as well as the optimized objc_alloc. | ||||||||
| 451 | static Optional<llvm::Value *> | ||||||||
| 452 | tryEmitSpecializedAllocInit(CodeGenFunction &CGF, const ObjCMessageExpr *OME) { | ||||||||
| 453 | auto &Runtime = CGF.getLangOpts().ObjCRuntime; | ||||||||
| 454 | if (!Runtime.shouldUseRuntimeFunctionForCombinedAllocInit()) | ||||||||
| 455 | return None; | ||||||||
| 456 | |||||||||
| 457 | // Match the exact pattern '[[MyClass alloc] init]'. | ||||||||
| 458 | Selector Sel = OME->getSelector(); | ||||||||
| 459 | if (OME->getReceiverKind() != ObjCMessageExpr::Instance || | ||||||||
| 460 | !OME->getType()->isObjCObjectPointerType() || !Sel.isUnarySelector() || | ||||||||
| 461 | Sel.getNameForSlot(0) != "init") | ||||||||
| 462 | return None; | ||||||||
| 463 | |||||||||
| 464 | // Okay, this is '[receiver init]', check if 'receiver' is '[cls alloc]' or | ||||||||
| 465 | // we are in an ObjC class method and 'receiver' is '[self alloc]'. | ||||||||
| 466 | auto *SubOME = | ||||||||
| 467 | dyn_cast<ObjCMessageExpr>(OME->getInstanceReceiver()->IgnoreParenCasts()); | ||||||||
| 468 | if (!SubOME
| ||||||||
| 469 | return None; | ||||||||
| 470 | Selector SubSel = SubOME->getSelector(); | ||||||||
| 471 | |||||||||
| 472 | // Check if we are in an ObjC class method and the receiver expression is | ||||||||
| 473 | // 'self'. | ||||||||
| 474 | const Expr *SelfInClassMethod = nullptr; | ||||||||
| 475 | if (const auto *CurMD
| ||||||||
| 476 | if (CurMD->isClassMethod()) | ||||||||
| 477 | if ((SelfInClassMethod = SubOME->getInstanceReceiver())) | ||||||||
| 478 | if (!SelfInClassMethod->isObjCSelfExpr()) | ||||||||
| 479 | SelfInClassMethod = nullptr; | ||||||||
| 480 | |||||||||
| 481 | if ((SubOME->getReceiverKind() != ObjCMessageExpr::Class && | ||||||||
| 482 | !SelfInClassMethod) || !SubOME->getType()->isObjCObjectPointerType() || | ||||||||
| 483 | !SubSel.isUnarySelector() || SubSel.getNameForSlot(0) != "alloc") | ||||||||
| 484 | return None; | ||||||||
| 485 | |||||||||
| 486 | llvm::Value *Receiver; | ||||||||
| 487 | if (SelfInClassMethod
| ||||||||
| 488 | Receiver = CGF.EmitScalarExpr(SelfInClassMethod); | ||||||||
| 489 | } else { | ||||||||
| 490 | QualType ReceiverType = SubOME->getClassReceiver(); | ||||||||
| 491 | const ObjCObjectType *ObjTy = ReceiverType->getAs<ObjCObjectType>(); | ||||||||
| 492 | const ObjCInterfaceDecl *ID = ObjTy->getInterface(); | ||||||||
| |||||||||
| 493 | assert(ID && "null interface should be impossible here")((ID && "null interface should be impossible here") ? static_cast<void> (0) : __assert_fail ("ID && \"null interface should be impossible here\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 493, __PRETTY_FUNCTION__)); | ||||||||
| 494 | Receiver = CGF.CGM.getObjCRuntime().GetClass(CGF, ID); | ||||||||
| 495 | } | ||||||||
| 496 | return CGF.EmitObjCAllocInit(Receiver, CGF.ConvertType(OME->getType())); | ||||||||
| 497 | } | ||||||||
| 498 | |||||||||
| 499 | RValue CodeGenFunction::EmitObjCMessageExpr(const ObjCMessageExpr *E, | ||||||||
| 500 | ReturnValueSlot Return) { | ||||||||
| 501 | // Only the lookup mechanism and first two arguments of the method | ||||||||
| 502 | // implementation vary between runtimes. We can get the receiver and | ||||||||
| 503 | // arguments in generic code. | ||||||||
| 504 | |||||||||
| 505 | bool isDelegateInit = E->isDelegateInitCall(); | ||||||||
| 506 | |||||||||
| 507 | const ObjCMethodDecl *method = E->getMethodDecl(); | ||||||||
| 508 | |||||||||
| 509 | // If the method is -retain, and the receiver's being loaded from | ||||||||
| 510 | // a __weak variable, peephole the entire operation to objc_loadWeakRetained. | ||||||||
| 511 | if (method
| ||||||||
| 512 | method->getMethodFamily() == OMF_retain) { | ||||||||
| 513 | if (auto lvalueExpr = findWeakLValue(E->getInstanceReceiver())) { | ||||||||
| 514 | LValue lvalue = EmitLValue(lvalueExpr); | ||||||||
| 515 | llvm::Value *result = EmitARCLoadWeakRetained(lvalue.getAddress(*this)); | ||||||||
| 516 | return AdjustObjCObjectType(*this, E->getType(), RValue::get(result)); | ||||||||
| 517 | } | ||||||||
| 518 | } | ||||||||
| 519 | |||||||||
| 520 | if (Optional<llvm::Value *> Val = tryEmitSpecializedAllocInit(*this, E)) | ||||||||
| |||||||||
| 521 | return AdjustObjCObjectType(*this, E->getType(), RValue::get(*Val)); | ||||||||
| 522 | |||||||||
| 523 | // We don't retain the receiver in delegate init calls, and this is | ||||||||
| 524 | // safe because the receiver value is always loaded from 'self', | ||||||||
| 525 | // which we zero out. We don't want to Block_copy block receivers, | ||||||||
| 526 | // though. | ||||||||
| 527 | bool retainSelf = | ||||||||
| 528 | (!isDelegateInit && | ||||||||
| 529 | CGM.getLangOpts().ObjCAutoRefCount && | ||||||||
| 530 | method && | ||||||||
| 531 | method->hasAttr<NSConsumesSelfAttr>()); | ||||||||
| 532 | |||||||||
| 533 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); | ||||||||
| 534 | bool isSuperMessage = false; | ||||||||
| 535 | bool isClassMessage = false; | ||||||||
| 536 | ObjCInterfaceDecl *OID = nullptr; | ||||||||
| 537 | // Find the receiver | ||||||||
| 538 | QualType ReceiverType; | ||||||||
| 539 | llvm::Value *Receiver = nullptr; | ||||||||
| 540 | switch (E->getReceiverKind()) { | ||||||||
| 541 | case ObjCMessageExpr::Instance: | ||||||||
| 542 | ReceiverType = E->getInstanceReceiver()->getType(); | ||||||||
| 543 | if (auto *OMD = dyn_cast_or_null<ObjCMethodDecl>(CurFuncDecl)) | ||||||||
| 544 | if (OMD->isClassMethod()) | ||||||||
| 545 | if (E->getInstanceReceiver()->isObjCSelfExpr()) | ||||||||
| 546 | isClassMessage = true; | ||||||||
| 547 | if (retainSelf) { | ||||||||
| 548 | TryEmitResult ter = tryEmitARCRetainScalarExpr(*this, | ||||||||
| 549 | E->getInstanceReceiver()); | ||||||||
| 550 | Receiver = ter.getPointer(); | ||||||||
| 551 | if (ter.getInt()) retainSelf = false; | ||||||||
| 552 | } else | ||||||||
| 553 | Receiver = EmitScalarExpr(E->getInstanceReceiver()); | ||||||||
| 554 | break; | ||||||||
| 555 | |||||||||
| 556 | case ObjCMessageExpr::Class: { | ||||||||
| 557 | ReceiverType = E->getClassReceiver(); | ||||||||
| 558 | const ObjCObjectType *ObjTy = ReceiverType->getAs<ObjCObjectType>(); | ||||||||
| 559 | assert(ObjTy && "Invalid Objective-C class message send")((ObjTy && "Invalid Objective-C class message send") ? static_cast<void> (0) : __assert_fail ("ObjTy && \"Invalid Objective-C class message send\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 559, __PRETTY_FUNCTION__)); | ||||||||
| 560 | OID = ObjTy->getInterface(); | ||||||||
| 561 | assert(OID && "Invalid Objective-C class message send")((OID && "Invalid Objective-C class message send") ? static_cast <void> (0) : __assert_fail ("OID && \"Invalid Objective-C class message send\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 561, __PRETTY_FUNCTION__)); | ||||||||
| 562 | Receiver = Runtime.GetClass(*this, OID); | ||||||||
| 563 | isClassMessage = true; | ||||||||
| 564 | break; | ||||||||
| 565 | } | ||||||||
| 566 | |||||||||
| 567 | case ObjCMessageExpr::SuperInstance: | ||||||||
| 568 | ReceiverType = E->getSuperType(); | ||||||||
| 569 | Receiver = LoadObjCSelf(); | ||||||||
| 570 | isSuperMessage = true; | ||||||||
| 571 | break; | ||||||||
| 572 | |||||||||
| 573 | case ObjCMessageExpr::SuperClass: | ||||||||
| 574 | ReceiverType = E->getSuperType(); | ||||||||
| 575 | Receiver = LoadObjCSelf(); | ||||||||
| 576 | isSuperMessage = true; | ||||||||
| 577 | isClassMessage = true; | ||||||||
| 578 | break; | ||||||||
| 579 | } | ||||||||
| 580 | |||||||||
| 581 | if (retainSelf) | ||||||||
| 582 | Receiver = EmitARCRetainNonBlock(Receiver); | ||||||||
| 583 | |||||||||
| 584 | // In ARC, we sometimes want to "extend the lifetime" | ||||||||
| 585 | // (i.e. retain+autorelease) of receivers of returns-inner-pointer | ||||||||
| 586 | // messages. | ||||||||
| 587 | if (getLangOpts().ObjCAutoRefCount && method && | ||||||||
| 588 | method->hasAttr<ObjCReturnsInnerPointerAttr>() && | ||||||||
| 589 | shouldExtendReceiverForInnerPointerMessage(E)) | ||||||||
| 590 | Receiver = EmitARCRetainAutorelease(ReceiverType, Receiver); | ||||||||
| 591 | |||||||||
| 592 | QualType ResultType = method ? method->getReturnType() : E->getType(); | ||||||||
| 593 | |||||||||
| 594 | CallArgList Args; | ||||||||
| 595 | EmitCallArgs(Args, method, E->arguments(), /*AC*/AbstractCallee(method)); | ||||||||
| 596 | |||||||||
| 597 | // For delegate init calls in ARC, do an unsafe store of null into | ||||||||
| 598 | // self. This represents the call taking direct ownership of that | ||||||||
| 599 | // value. We have to do this after emitting the other call | ||||||||
| 600 | // arguments because they might also reference self, but we don't | ||||||||
| 601 | // have to worry about any of them modifying self because that would | ||||||||
| 602 | // be an undefined read and write of an object in unordered | ||||||||
| 603 | // expressions. | ||||||||
| 604 | if (isDelegateInit) { | ||||||||
| 605 | assert(getLangOpts().ObjCAutoRefCount &&((getLangOpts().ObjCAutoRefCount && "delegate init calls should only be marked in ARC" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().ObjCAutoRefCount && \"delegate init calls should only be marked in ARC\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 606, __PRETTY_FUNCTION__)) | ||||||||
| 606 | "delegate init calls should only be marked in ARC")((getLangOpts().ObjCAutoRefCount && "delegate init calls should only be marked in ARC" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().ObjCAutoRefCount && \"delegate init calls should only be marked in ARC\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 606, __PRETTY_FUNCTION__)); | ||||||||
| 607 | |||||||||
| 608 | // Do an unsafe store of null into self. | ||||||||
| 609 | Address selfAddr = | ||||||||
| 610 | GetAddrOfLocalVar(cast<ObjCMethodDecl>(CurCodeDecl)->getSelfDecl()); | ||||||||
| 611 | Builder.CreateStore(getNullForVariable(selfAddr), selfAddr); | ||||||||
| 612 | } | ||||||||
| 613 | |||||||||
| 614 | RValue result; | ||||||||
| 615 | if (isSuperMessage) { | ||||||||
| 616 | // super is only valid in an Objective-C method | ||||||||
| 617 | const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); | ||||||||
| 618 | bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext()); | ||||||||
| 619 | result = Runtime.GenerateMessageSendSuper(*this, Return, ResultType, | ||||||||
| 620 | E->getSelector(), | ||||||||
| 621 | OMD->getClassInterface(), | ||||||||
| 622 | isCategoryImpl, | ||||||||
| 623 | Receiver, | ||||||||
| 624 | isClassMessage, | ||||||||
| 625 | Args, | ||||||||
| 626 | method); | ||||||||
| 627 | } else { | ||||||||
| 628 | // Call runtime methods directly if we can. | ||||||||
| 629 | result = Runtime.GeneratePossiblySpecializedMessageSend( | ||||||||
| 630 | *this, Return, ResultType, E->getSelector(), Receiver, Args, OID, | ||||||||
| 631 | method, isClassMessage); | ||||||||
| 632 | } | ||||||||
| 633 | |||||||||
| 634 | // For delegate init calls in ARC, implicitly store the result of | ||||||||
| 635 | // the call back into self. This takes ownership of the value. | ||||||||
| 636 | if (isDelegateInit) { | ||||||||
| 637 | Address selfAddr = | ||||||||
| 638 | GetAddrOfLocalVar(cast<ObjCMethodDecl>(CurCodeDecl)->getSelfDecl()); | ||||||||
| 639 | llvm::Value *newSelf = result.getScalarVal(); | ||||||||
| 640 | |||||||||
| 641 | // The delegate return type isn't necessarily a matching type; in | ||||||||
| 642 | // fact, it's quite likely to be 'id'. | ||||||||
| 643 | llvm::Type *selfTy = selfAddr.getElementType(); | ||||||||
| 644 | newSelf = Builder.CreateBitCast(newSelf, selfTy); | ||||||||
| 645 | |||||||||
| 646 | Builder.CreateStore(newSelf, selfAddr); | ||||||||
| 647 | } | ||||||||
| 648 | |||||||||
| 649 | return AdjustObjCObjectType(*this, E->getType(), result); | ||||||||
| 650 | } | ||||||||
| 651 | |||||||||
| 652 | namespace { | ||||||||
| 653 | struct FinishARCDealloc final : EHScopeStack::Cleanup { | ||||||||
| 654 | void Emit(CodeGenFunction &CGF, Flags flags) override { | ||||||||
| 655 | const ObjCMethodDecl *method = cast<ObjCMethodDecl>(CGF.CurCodeDecl); | ||||||||
| 656 | |||||||||
| 657 | const ObjCImplDecl *impl = cast<ObjCImplDecl>(method->getDeclContext()); | ||||||||
| 658 | const ObjCInterfaceDecl *iface = impl->getClassInterface(); | ||||||||
| 659 | if (!iface->getSuperClass()) return; | ||||||||
| 660 | |||||||||
| 661 | bool isCategory = isa<ObjCCategoryImplDecl>(impl); | ||||||||
| 662 | |||||||||
| 663 | // Call [super dealloc] if we have a superclass. | ||||||||
| 664 | llvm::Value *self = CGF.LoadObjCSelf(); | ||||||||
| 665 | |||||||||
| 666 | CallArgList args; | ||||||||
| 667 | CGF.CGM.getObjCRuntime().GenerateMessageSendSuper(CGF, ReturnValueSlot(), | ||||||||
| 668 | CGF.getContext().VoidTy, | ||||||||
| 669 | method->getSelector(), | ||||||||
| 670 | iface, | ||||||||
| 671 | isCategory, | ||||||||
| 672 | self, | ||||||||
| 673 | /*is class msg*/ false, | ||||||||
| 674 | args, | ||||||||
| 675 | method); | ||||||||
| 676 | } | ||||||||
| 677 | }; | ||||||||
| 678 | } | ||||||||
| 679 | |||||||||
| 680 | /// StartObjCMethod - Begin emission of an ObjCMethod. This generates | ||||||||
| 681 | /// the LLVM function and sets the other context used by | ||||||||
| 682 | /// CodeGenFunction. | ||||||||
| 683 | void CodeGenFunction::StartObjCMethod(const ObjCMethodDecl *OMD, | ||||||||
| 684 | const ObjCContainerDecl *CD) { | ||||||||
| 685 | SourceLocation StartLoc = OMD->getBeginLoc(); | ||||||||
| 686 | FunctionArgList args; | ||||||||
| 687 | // Check if we should generate debug info for this method. | ||||||||
| 688 | if (OMD->hasAttr<NoDebugAttr>()) | ||||||||
| 689 | DebugInfo = nullptr; // disable debug info indefinitely for this function | ||||||||
| 690 | |||||||||
| 691 | llvm::Function *Fn = CGM.getObjCRuntime().GenerateMethod(OMD, CD); | ||||||||
| 692 | |||||||||
| 693 | const CGFunctionInfo &FI = CGM.getTypes().arrangeObjCMethodDeclaration(OMD); | ||||||||
| 694 | if (OMD->isDirectMethod()) { | ||||||||
| 695 | Fn->setVisibility(llvm::Function::HiddenVisibility); | ||||||||
| 696 | CGM.SetLLVMFunctionAttributes(OMD, FI, Fn); | ||||||||
| 697 | CGM.SetLLVMFunctionAttributesForDefinition(OMD, Fn); | ||||||||
| 698 | } else { | ||||||||
| 699 | CGM.SetInternalFunctionAttributes(OMD, Fn, FI); | ||||||||
| 700 | } | ||||||||
| 701 | |||||||||
| 702 | args.push_back(OMD->getSelfDecl()); | ||||||||
| 703 | args.push_back(OMD->getCmdDecl()); | ||||||||
| 704 | |||||||||
| 705 | args.append(OMD->param_begin(), OMD->param_end()); | ||||||||
| 706 | |||||||||
| 707 | CurGD = OMD; | ||||||||
| 708 | CurEHLocation = OMD->getEndLoc(); | ||||||||
| 709 | |||||||||
| 710 | StartFunction(OMD, OMD->getReturnType(), Fn, FI, args, | ||||||||
| 711 | OMD->getLocation(), StartLoc); | ||||||||
| 712 | |||||||||
| 713 | if (OMD->isDirectMethod()) { | ||||||||
| 714 | // This function is a direct call, it has to implement a nil check | ||||||||
| 715 | // on entry. | ||||||||
| 716 | // | ||||||||
| 717 | // TODO: possibly have several entry points to elide the check | ||||||||
| 718 | CGM.getObjCRuntime().GenerateDirectMethodPrologue(*this, Fn, OMD, CD); | ||||||||
| 719 | } | ||||||||
| 720 | |||||||||
| 721 | // In ARC, certain methods get an extra cleanup. | ||||||||
| 722 | if (CGM.getLangOpts().ObjCAutoRefCount && | ||||||||
| 723 | OMD->isInstanceMethod() && | ||||||||
| 724 | OMD->getSelector().isUnarySelector()) { | ||||||||
| 725 | const IdentifierInfo *ident = | ||||||||
| 726 | OMD->getSelector().getIdentifierInfoForSlot(0); | ||||||||
| 727 | if (ident->isStr("dealloc")) | ||||||||
| 728 | EHStack.pushCleanup<FinishARCDealloc>(getARCCleanupKind()); | ||||||||
| 729 | } | ||||||||
| 730 | } | ||||||||
| 731 | |||||||||
| 732 | static llvm::Value *emitARCRetainLoadOfScalar(CodeGenFunction &CGF, | ||||||||
| 733 | LValue lvalue, QualType type); | ||||||||
| 734 | |||||||||
| 735 | /// Generate an Objective-C method. An Objective-C method is a C function with | ||||||||
| 736 | /// its pointer, name, and types registered in the class structure. | ||||||||
| 737 | void CodeGenFunction::GenerateObjCMethod(const ObjCMethodDecl *OMD) { | ||||||||
| 738 | StartObjCMethod(OMD, OMD->getClassInterface()); | ||||||||
| 739 | PGO.assignRegionCounters(GlobalDecl(OMD), CurFn); | ||||||||
| 740 | assert(isa<CompoundStmt>(OMD->getBody()))((isa<CompoundStmt>(OMD->getBody())) ? static_cast< void> (0) : __assert_fail ("isa<CompoundStmt>(OMD->getBody())" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 740, __PRETTY_FUNCTION__)); | ||||||||
| 741 | incrementProfileCounter(OMD->getBody()); | ||||||||
| 742 | EmitCompoundStmtWithoutScope(*cast<CompoundStmt>(OMD->getBody())); | ||||||||
| 743 | FinishFunction(OMD->getBodyRBrace()); | ||||||||
| 744 | } | ||||||||
| 745 | |||||||||
| 746 | /// emitStructGetterCall - Call the runtime function to load a property | ||||||||
| 747 | /// into the return value slot. | ||||||||
| 748 | static void emitStructGetterCall(CodeGenFunction &CGF, ObjCIvarDecl *ivar, | ||||||||
| 749 | bool isAtomic, bool hasStrong) { | ||||||||
| 750 | ASTContext &Context = CGF.getContext(); | ||||||||
| 751 | |||||||||
| 752 | Address src = | ||||||||
| 753 | CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), CGF.LoadObjCSelf(), ivar, 0) | ||||||||
| 754 | .getAddress(CGF); | ||||||||
| 755 | |||||||||
| 756 | // objc_copyStruct (ReturnValue, &structIvar, | ||||||||
| 757 | // sizeof (Type of Ivar), isAtomic, false); | ||||||||
| 758 | CallArgList args; | ||||||||
| 759 | |||||||||
| 760 | Address dest = CGF.Builder.CreateBitCast(CGF.ReturnValue, CGF.VoidPtrTy); | ||||||||
| 761 | args.add(RValue::get(dest.getPointer()), Context.VoidPtrTy); | ||||||||
| 762 | |||||||||
| 763 | src = CGF.Builder.CreateBitCast(src, CGF.VoidPtrTy); | ||||||||
| 764 | args.add(RValue::get(src.getPointer()), Context.VoidPtrTy); | ||||||||
| 765 | |||||||||
| 766 | CharUnits size = CGF.getContext().getTypeSizeInChars(ivar->getType()); | ||||||||
| 767 | args.add(RValue::get(CGF.CGM.getSize(size)), Context.getSizeType()); | ||||||||
| 768 | args.add(RValue::get(CGF.Builder.getInt1(isAtomic)), Context.BoolTy); | ||||||||
| 769 | args.add(RValue::get(CGF.Builder.getInt1(hasStrong)), Context.BoolTy); | ||||||||
| 770 | |||||||||
| 771 | llvm::FunctionCallee fn = CGF.CGM.getObjCRuntime().GetGetStructFunction(); | ||||||||
| 772 | CGCallee callee = CGCallee::forDirect(fn); | ||||||||
| 773 | CGF.EmitCall(CGF.getTypes().arrangeBuiltinFunctionCall(Context.VoidTy, args), | ||||||||
| 774 | callee, ReturnValueSlot(), args); | ||||||||
| 775 | } | ||||||||
| 776 | |||||||||
| 777 | /// Determine whether the given architecture supports unaligned atomic | ||||||||
| 778 | /// accesses. They don't have to be fast, just faster than a function | ||||||||
| 779 | /// call and a mutex. | ||||||||
| 780 | static bool hasUnalignedAtomics(llvm::Triple::ArchType arch) { | ||||||||
| 781 | // FIXME: Allow unaligned atomic load/store on x86. (It is not | ||||||||
| 782 | // currently supported by the backend.) | ||||||||
| 783 | return 0; | ||||||||
| 784 | } | ||||||||
| 785 | |||||||||
| 786 | /// Return the maximum size that permits atomic accesses for the given | ||||||||
| 787 | /// architecture. | ||||||||
| 788 | static CharUnits getMaxAtomicAccessSize(CodeGenModule &CGM, | ||||||||
| 789 | llvm::Triple::ArchType arch) { | ||||||||
| 790 | // ARM has 8-byte atomic accesses, but it's not clear whether we | ||||||||
| 791 | // want to rely on them here. | ||||||||
| 792 | |||||||||
| 793 | // In the default case, just assume that any size up to a pointer is | ||||||||
| 794 | // fine given adequate alignment. | ||||||||
| 795 | return CharUnits::fromQuantity(CGM.PointerSizeInBytes); | ||||||||
| 796 | } | ||||||||
| 797 | |||||||||
| 798 | namespace { | ||||||||
| 799 | class PropertyImplStrategy { | ||||||||
| 800 | public: | ||||||||
| 801 | enum StrategyKind { | ||||||||
| 802 | /// The 'native' strategy is to use the architecture's provided | ||||||||
| 803 | /// reads and writes. | ||||||||
| 804 | Native, | ||||||||
| 805 | |||||||||
| 806 | /// Use objc_setProperty and objc_getProperty. | ||||||||
| 807 | GetSetProperty, | ||||||||
| 808 | |||||||||
| 809 | /// Use objc_setProperty for the setter, but use expression | ||||||||
| 810 | /// evaluation for the getter. | ||||||||
| 811 | SetPropertyAndExpressionGet, | ||||||||
| 812 | |||||||||
| 813 | /// Use objc_copyStruct. | ||||||||
| 814 | CopyStruct, | ||||||||
| 815 | |||||||||
| 816 | /// The 'expression' strategy is to emit normal assignment or | ||||||||
| 817 | /// lvalue-to-rvalue expressions. | ||||||||
| 818 | Expression | ||||||||
| 819 | }; | ||||||||
| 820 | |||||||||
| 821 | StrategyKind getKind() const { return StrategyKind(Kind); } | ||||||||
| 822 | |||||||||
| 823 | bool hasStrongMember() const { return HasStrong; } | ||||||||
| 824 | bool isAtomic() const { return IsAtomic; } | ||||||||
| 825 | bool isCopy() const { return IsCopy; } | ||||||||
| 826 | |||||||||
| 827 | CharUnits getIvarSize() const { return IvarSize; } | ||||||||
| 828 | CharUnits getIvarAlignment() const { return IvarAlignment; } | ||||||||
| 829 | |||||||||
| 830 | PropertyImplStrategy(CodeGenModule &CGM, | ||||||||
| 831 | const ObjCPropertyImplDecl *propImpl); | ||||||||
| 832 | |||||||||
| 833 | private: | ||||||||
| 834 | unsigned Kind : 8; | ||||||||
| 835 | unsigned IsAtomic : 1; | ||||||||
| 836 | unsigned IsCopy : 1; | ||||||||
| 837 | unsigned HasStrong : 1; | ||||||||
| 838 | |||||||||
| 839 | CharUnits IvarSize; | ||||||||
| 840 | CharUnits IvarAlignment; | ||||||||
| 841 | }; | ||||||||
| 842 | } | ||||||||
| 843 | |||||||||
| 844 | /// Pick an implementation strategy for the given property synthesis. | ||||||||
| 845 | PropertyImplStrategy::PropertyImplStrategy(CodeGenModule &CGM, | ||||||||
| 846 | const ObjCPropertyImplDecl *propImpl) { | ||||||||
| 847 | const ObjCPropertyDecl *prop = propImpl->getPropertyDecl(); | ||||||||
| 848 | ObjCPropertyDecl::SetterKind setterKind = prop->getSetterKind(); | ||||||||
| 849 | |||||||||
| 850 | IsCopy = (setterKind == ObjCPropertyDecl::Copy); | ||||||||
| 851 | IsAtomic = prop->isAtomic(); | ||||||||
| 852 | HasStrong = false; // doesn't matter here. | ||||||||
| 853 | |||||||||
| 854 | // Evaluate the ivar's size and alignment. | ||||||||
| 855 | ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); | ||||||||
| 856 | QualType ivarType = ivar->getType(); | ||||||||
| 857 | std::tie(IvarSize, IvarAlignment) = | ||||||||
| 858 | CGM.getContext().getTypeInfoInChars(ivarType); | ||||||||
| 859 | |||||||||
| 860 | // If we have a copy property, we always have to use getProperty/setProperty. | ||||||||
| 861 | // TODO: we could actually use setProperty and an expression for non-atomics. | ||||||||
| 862 | if (IsCopy) { | ||||||||
| 863 | Kind = GetSetProperty; | ||||||||
| 864 | return; | ||||||||
| 865 | } | ||||||||
| 866 | |||||||||
| 867 | // Handle retain. | ||||||||
| 868 | if (setterKind == ObjCPropertyDecl::Retain) { | ||||||||
| 869 | // In GC-only, there's nothing special that needs to be done. | ||||||||
| 870 | if (CGM.getLangOpts().getGC() == LangOptions::GCOnly) { | ||||||||
| 871 | // fallthrough | ||||||||
| 872 | |||||||||
| 873 | // In ARC, if the property is non-atomic, use expression emission, | ||||||||
| 874 | // which translates to objc_storeStrong. This isn't required, but | ||||||||
| 875 | // it's slightly nicer. | ||||||||
| 876 | } else if (CGM.getLangOpts().ObjCAutoRefCount && !IsAtomic) { | ||||||||
| 877 | // Using standard expression emission for the setter is only | ||||||||
| 878 | // acceptable if the ivar is __strong, which won't be true if | ||||||||
| 879 | // the property is annotated with __attribute__((NSObject)). | ||||||||
| 880 | // TODO: falling all the way back to objc_setProperty here is | ||||||||
| 881 | // just laziness, though; we could still use objc_storeStrong | ||||||||
| 882 | // if we hacked it right. | ||||||||
| 883 | if (ivarType.getObjCLifetime() == Qualifiers::OCL_Strong) | ||||||||
| 884 | Kind = Expression; | ||||||||
| 885 | else | ||||||||
| 886 | Kind = SetPropertyAndExpressionGet; | ||||||||
| 887 | return; | ||||||||
| 888 | |||||||||
| 889 | // Otherwise, we need to at least use setProperty. However, if | ||||||||
| 890 | // the property isn't atomic, we can use normal expression | ||||||||
| 891 | // emission for the getter. | ||||||||
| 892 | } else if (!IsAtomic) { | ||||||||
| 893 | Kind = SetPropertyAndExpressionGet; | ||||||||
| 894 | return; | ||||||||
| 895 | |||||||||
| 896 | // Otherwise, we have to use both setProperty and getProperty. | ||||||||
| 897 | } else { | ||||||||
| 898 | Kind = GetSetProperty; | ||||||||
| 899 | return; | ||||||||
| 900 | } | ||||||||
| 901 | } | ||||||||
| 902 | |||||||||
| 903 | // If we're not atomic, just use expression accesses. | ||||||||
| 904 | if (!IsAtomic) { | ||||||||
| 905 | Kind = Expression; | ||||||||
| 906 | return; | ||||||||
| 907 | } | ||||||||
| 908 | |||||||||
| 909 | // Properties on bitfield ivars need to be emitted using expression | ||||||||
| 910 | // accesses even if they're nominally atomic. | ||||||||
| 911 | if (ivar->isBitField()) { | ||||||||
| 912 | Kind = Expression; | ||||||||
| 913 | return; | ||||||||
| 914 | } | ||||||||
| 915 | |||||||||
| 916 | // GC-qualified or ARC-qualified ivars need to be emitted as | ||||||||
| 917 | // expressions. This actually works out to being atomic anyway, | ||||||||
| 918 | // except for ARC __strong, but that should trigger the above code. | ||||||||
| 919 | if (ivarType.hasNonTrivialObjCLifetime() || | ||||||||
| 920 | (CGM.getLangOpts().getGC() && | ||||||||
| 921 | CGM.getContext().getObjCGCAttrKind(ivarType))) { | ||||||||
| 922 | Kind = Expression; | ||||||||
| 923 | return; | ||||||||
| 924 | } | ||||||||
| 925 | |||||||||
| 926 | // Compute whether the ivar has strong members. | ||||||||
| 927 | if (CGM.getLangOpts().getGC()) | ||||||||
| 928 | if (const RecordType *recordType = ivarType->getAs<RecordType>()) | ||||||||
| 929 | HasStrong = recordType->getDecl()->hasObjectMember(); | ||||||||
| 930 | |||||||||
| 931 | // We can never access structs with object members with a native | ||||||||
| 932 | // access, because we need to use write barriers. This is what | ||||||||
| 933 | // objc_copyStruct is for. | ||||||||
| 934 | if (HasStrong) { | ||||||||
| 935 | Kind = CopyStruct; | ||||||||
| 936 | return; | ||||||||
| 937 | } | ||||||||
| 938 | |||||||||
| 939 | // Otherwise, this is target-dependent and based on the size and | ||||||||
| 940 | // alignment of the ivar. | ||||||||
| 941 | |||||||||
| 942 | // If the size of the ivar is not a power of two, give up. We don't | ||||||||
| 943 | // want to get into the business of doing compare-and-swaps. | ||||||||
| 944 | if (!IvarSize.isPowerOfTwo()) { | ||||||||
| 945 | Kind = CopyStruct; | ||||||||
| 946 | return; | ||||||||
| 947 | } | ||||||||
| 948 | |||||||||
| 949 | llvm::Triple::ArchType arch = | ||||||||
| 950 | CGM.getTarget().getTriple().getArch(); | ||||||||
| 951 | |||||||||
| 952 | // Most architectures require memory to fit within a single cache | ||||||||
| 953 | // line, so the alignment has to be at least the size of the access. | ||||||||
| 954 | // Otherwise we have to grab a lock. | ||||||||
| 955 | if (IvarAlignment < IvarSize && !hasUnalignedAtomics(arch)) { | ||||||||
| 956 | Kind = CopyStruct; | ||||||||
| 957 | return; | ||||||||
| 958 | } | ||||||||
| 959 | |||||||||
| 960 | // If the ivar's size exceeds the architecture's maximum atomic | ||||||||
| 961 | // access size, we have to use CopyStruct. | ||||||||
| 962 | if (IvarSize > getMaxAtomicAccessSize(CGM, arch)) { | ||||||||
| 963 | Kind = CopyStruct; | ||||||||
| 964 | return; | ||||||||
| 965 | } | ||||||||
| 966 | |||||||||
| 967 | // Otherwise, we can use native loads and stores. | ||||||||
| 968 | Kind = Native; | ||||||||
| 969 | } | ||||||||
| 970 | |||||||||
| 971 | /// Generate an Objective-C property getter function. | ||||||||
| 972 | /// | ||||||||
| 973 | /// The given Decl must be an ObjCImplementationDecl. \@synthesize | ||||||||
| 974 | /// is illegal within a category. | ||||||||
| 975 | void CodeGenFunction::GenerateObjCGetter(ObjCImplementationDecl *IMP, | ||||||||
| 976 | const ObjCPropertyImplDecl *PID) { | ||||||||
| 977 | llvm::Constant *AtomicHelperFn = | ||||||||
| 978 | CodeGenFunction(CGM).GenerateObjCAtomicGetterCopyHelperFunction(PID); | ||||||||
| 979 | ObjCMethodDecl *OMD = PID->getGetterMethodDecl(); | ||||||||
| 980 | assert(OMD && "Invalid call to generate getter (empty method)")((OMD && "Invalid call to generate getter (empty method)" ) ? static_cast<void> (0) : __assert_fail ("OMD && \"Invalid call to generate getter (empty method)\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 980, __PRETTY_FUNCTION__)); | ||||||||
| 981 | StartObjCMethod(OMD, IMP->getClassInterface()); | ||||||||
| 982 | |||||||||
| 983 | generateObjCGetterBody(IMP, PID, OMD, AtomicHelperFn); | ||||||||
| 984 | |||||||||
| 985 | FinishFunction(OMD->getEndLoc()); | ||||||||
| 986 | } | ||||||||
| 987 | |||||||||
| 988 | static bool hasTrivialGetExpr(const ObjCPropertyImplDecl *propImpl) { | ||||||||
| 989 | const Expr *getter = propImpl->getGetterCXXConstructor(); | ||||||||
| 990 | if (!getter) return true; | ||||||||
| 991 | |||||||||
| 992 | // Sema only makes only of these when the ivar has a C++ class type, | ||||||||
| 993 | // so the form is pretty constrained. | ||||||||
| 994 | |||||||||
| 995 | // If the property has a reference type, we might just be binding a | ||||||||
| 996 | // reference, in which case the result will be a gl-value. We should | ||||||||
| 997 | // treat this as a non-trivial operation. | ||||||||
| 998 | if (getter->isGLValue()) | ||||||||
| 999 | return false; | ||||||||
| 1000 | |||||||||
| 1001 | // If we selected a trivial copy-constructor, we're okay. | ||||||||
| 1002 | if (const CXXConstructExpr *construct = dyn_cast<CXXConstructExpr>(getter)) | ||||||||
| 1003 | return (construct->getConstructor()->isTrivial()); | ||||||||
| 1004 | |||||||||
| 1005 | // The constructor might require cleanups (in which case it's never | ||||||||
| 1006 | // trivial). | ||||||||
| 1007 | assert(isa<ExprWithCleanups>(getter))((isa<ExprWithCleanups>(getter)) ? static_cast<void> (0) : __assert_fail ("isa<ExprWithCleanups>(getter)", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 1007, __PRETTY_FUNCTION__)); | ||||||||
| 1008 | return false; | ||||||||
| 1009 | } | ||||||||
| 1010 | |||||||||
| 1011 | /// emitCPPObjectAtomicGetterCall - Call the runtime function to | ||||||||
| 1012 | /// copy the ivar into the resturn slot. | ||||||||
| 1013 | static void emitCPPObjectAtomicGetterCall(CodeGenFunction &CGF, | ||||||||
| 1014 | llvm::Value *returnAddr, | ||||||||
| 1015 | ObjCIvarDecl *ivar, | ||||||||
| 1016 | llvm::Constant *AtomicHelperFn) { | ||||||||
| 1017 | // objc_copyCppObjectAtomic (&returnSlot, &CppObjectIvar, | ||||||||
| 1018 | // AtomicHelperFn); | ||||||||
| 1019 | CallArgList args; | ||||||||
| 1020 | |||||||||
| 1021 | // The 1st argument is the return Slot. | ||||||||
| 1022 | args.add(RValue::get(returnAddr), CGF.getContext().VoidPtrTy); | ||||||||
| 1023 | |||||||||
| 1024 | // The 2nd argument is the address of the ivar. | ||||||||
| 1025 | llvm::Value *ivarAddr = | ||||||||
| 1026 | CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), CGF.LoadObjCSelf(), ivar, 0) | ||||||||
| 1027 | .getPointer(CGF); | ||||||||
| 1028 | ivarAddr = CGF.Builder.CreateBitCast(ivarAddr, CGF.Int8PtrTy); | ||||||||
| 1029 | args.add(RValue::get(ivarAddr), CGF.getContext().VoidPtrTy); | ||||||||
| 1030 | |||||||||
| 1031 | // Third argument is the helper function. | ||||||||
| 1032 | args.add(RValue::get(AtomicHelperFn), CGF.getContext().VoidPtrTy); | ||||||||
| 1033 | |||||||||
| 1034 | llvm::FunctionCallee copyCppAtomicObjectFn = | ||||||||
| 1035 | CGF.CGM.getObjCRuntime().GetCppAtomicObjectGetFunction(); | ||||||||
| 1036 | CGCallee callee = CGCallee::forDirect(copyCppAtomicObjectFn); | ||||||||
| 1037 | CGF.EmitCall( | ||||||||
| 1038 | CGF.getTypes().arrangeBuiltinFunctionCall(CGF.getContext().VoidTy, args), | ||||||||
| 1039 | callee, ReturnValueSlot(), args); | ||||||||
| 1040 | } | ||||||||
| 1041 | |||||||||
| 1042 | void | ||||||||
| 1043 | CodeGenFunction::generateObjCGetterBody(const ObjCImplementationDecl *classImpl, | ||||||||
| 1044 | const ObjCPropertyImplDecl *propImpl, | ||||||||
| 1045 | const ObjCMethodDecl *GetterMethodDecl, | ||||||||
| 1046 | llvm::Constant *AtomicHelperFn) { | ||||||||
| 1047 | // If there's a non-trivial 'get' expression, we just have to emit that. | ||||||||
| 1048 | if (!hasTrivialGetExpr(propImpl)) { | ||||||||
| 1049 | if (!AtomicHelperFn) { | ||||||||
| 1050 | auto *ret = ReturnStmt::Create(getContext(), SourceLocation(), | ||||||||
| 1051 | propImpl->getGetterCXXConstructor(), | ||||||||
| 1052 | /* NRVOCandidate=*/nullptr); | ||||||||
| 1053 | EmitReturnStmt(*ret); | ||||||||
| 1054 | } | ||||||||
| 1055 | else { | ||||||||
| 1056 | ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); | ||||||||
| 1057 | emitCPPObjectAtomicGetterCall(*this, ReturnValue.getPointer(), | ||||||||
| 1058 | ivar, AtomicHelperFn); | ||||||||
| 1059 | } | ||||||||
| 1060 | return; | ||||||||
| 1061 | } | ||||||||
| 1062 | |||||||||
| 1063 | const ObjCPropertyDecl *prop = propImpl->getPropertyDecl(); | ||||||||
| 1064 | QualType propType = prop->getType(); | ||||||||
| 1065 | ObjCMethodDecl *getterMethod = propImpl->getGetterMethodDecl(); | ||||||||
| 1066 | |||||||||
| 1067 | ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); | ||||||||
| 1068 | |||||||||
| 1069 | // Pick an implementation strategy. | ||||||||
| 1070 | PropertyImplStrategy strategy(CGM, propImpl); | ||||||||
| 1071 | switch (strategy.getKind()) { | ||||||||
| 1072 | case PropertyImplStrategy::Native: { | ||||||||
| 1073 | // We don't need to do anything for a zero-size struct. | ||||||||
| 1074 | if (strategy.getIvarSize().isZero()) | ||||||||
| 1075 | return; | ||||||||
| 1076 | |||||||||
| 1077 | LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), ivar, 0); | ||||||||
| 1078 | |||||||||
| 1079 | // Currently, all atomic accesses have to be through integer | ||||||||
| 1080 | // types, so there's no point in trying to pick a prettier type. | ||||||||
| 1081 | uint64_t ivarSize = getContext().toBits(strategy.getIvarSize()); | ||||||||
| 1082 | llvm::Type *bitcastType = llvm::Type::getIntNTy(getLLVMContext(), ivarSize); | ||||||||
| 1083 | bitcastType = bitcastType->getPointerTo(); // addrspace 0 okay | ||||||||
| 1084 | |||||||||
| 1085 | // Perform an atomic load. This does not impose ordering constraints. | ||||||||
| 1086 | Address ivarAddr = LV.getAddress(*this); | ||||||||
| 1087 | ivarAddr = Builder.CreateBitCast(ivarAddr, bitcastType); | ||||||||
| 1088 | llvm::LoadInst *load = Builder.CreateLoad(ivarAddr, "load"); | ||||||||
| 1089 | load->setAtomic(llvm::AtomicOrdering::Unordered); | ||||||||
| 1090 | |||||||||
| 1091 | // Store that value into the return address. Doing this with a | ||||||||
| 1092 | // bitcast is likely to produce some pretty ugly IR, but it's not | ||||||||
| 1093 | // the *most* terrible thing in the world. | ||||||||
| 1094 | llvm::Type *retTy = ConvertType(getterMethod->getReturnType()); | ||||||||
| 1095 | uint64_t retTySize = CGM.getDataLayout().getTypeSizeInBits(retTy); | ||||||||
| 1096 | llvm::Value *ivarVal = load; | ||||||||
| 1097 | if (ivarSize > retTySize) { | ||||||||
| 1098 | llvm::Type *newTy = llvm::Type::getIntNTy(getLLVMContext(), retTySize); | ||||||||
| 1099 | ivarVal = Builder.CreateTrunc(load, newTy); | ||||||||
| 1100 | bitcastType = newTy->getPointerTo(); | ||||||||
| 1101 | } | ||||||||
| 1102 | Builder.CreateStore(ivarVal, | ||||||||
| 1103 | Builder.CreateBitCast(ReturnValue, bitcastType)); | ||||||||
| 1104 | |||||||||
| 1105 | // Make sure we don't do an autorelease. | ||||||||
| 1106 | AutoreleaseResult = false; | ||||||||
| 1107 | return; | ||||||||
| 1108 | } | ||||||||
| 1109 | |||||||||
| 1110 | case PropertyImplStrategy::GetSetProperty: { | ||||||||
| 1111 | llvm::FunctionCallee getPropertyFn = | ||||||||
| 1112 | CGM.getObjCRuntime().GetPropertyGetFunction(); | ||||||||
| 1113 | if (!getPropertyFn) { | ||||||||
| 1114 | CGM.ErrorUnsupported(propImpl, "Obj-C getter requiring atomic copy"); | ||||||||
| 1115 | return; | ||||||||
| 1116 | } | ||||||||
| 1117 | CGCallee callee = CGCallee::forDirect(getPropertyFn); | ||||||||
| 1118 | |||||||||
| 1119 | // Return (ivar-type) objc_getProperty((id) self, _cmd, offset, true). | ||||||||
| 1120 | // FIXME: Can't this be simpler? This might even be worse than the | ||||||||
| 1121 | // corresponding gcc code. | ||||||||
| 1122 | llvm::Value *cmd = | ||||||||
| 1123 | Builder.CreateLoad(GetAddrOfLocalVar(getterMethod->getCmdDecl()), "cmd"); | ||||||||
| 1124 | llvm::Value *self = Builder.CreateBitCast(LoadObjCSelf(), VoidPtrTy); | ||||||||
| 1125 | llvm::Value *ivarOffset = | ||||||||
| 1126 | EmitIvarOffset(classImpl->getClassInterface(), ivar); | ||||||||
| 1127 | |||||||||
| 1128 | CallArgList args; | ||||||||
| 1129 | args.add(RValue::get(self), getContext().getObjCIdType()); | ||||||||
| 1130 | args.add(RValue::get(cmd), getContext().getObjCSelType()); | ||||||||
| 1131 | args.add(RValue::get(ivarOffset), getContext().getPointerDiffType()); | ||||||||
| 1132 | args.add(RValue::get(Builder.getInt1(strategy.isAtomic())), | ||||||||
| 1133 | getContext().BoolTy); | ||||||||
| 1134 | |||||||||
| 1135 | // FIXME: We shouldn't need to get the function info here, the | ||||||||
| 1136 | // runtime already should have computed it to build the function. | ||||||||
| 1137 | llvm::CallBase *CallInstruction; | ||||||||
| 1138 | RValue RV = EmitCall(getTypes().arrangeBuiltinFunctionCall( | ||||||||
| 1139 | getContext().getObjCIdType(), args), | ||||||||
| 1140 | callee, ReturnValueSlot(), args, &CallInstruction); | ||||||||
| 1141 | if (llvm::CallInst *call = dyn_cast<llvm::CallInst>(CallInstruction)) | ||||||||
| 1142 | call->setTailCall(); | ||||||||
| 1143 | |||||||||
| 1144 | // We need to fix the type here. Ivars with copy & retain are | ||||||||
| 1145 | // always objects so we don't need to worry about complex or | ||||||||
| 1146 | // aggregates. | ||||||||
| 1147 | RV = RValue::get(Builder.CreateBitCast( | ||||||||
| 1148 | RV.getScalarVal(), | ||||||||
| 1149 | getTypes().ConvertType(getterMethod->getReturnType()))); | ||||||||
| 1150 | |||||||||
| 1151 | EmitReturnOfRValue(RV, propType); | ||||||||
| 1152 | |||||||||
| 1153 | // objc_getProperty does an autorelease, so we should suppress ours. | ||||||||
| 1154 | AutoreleaseResult = false; | ||||||||
| 1155 | |||||||||
| 1156 | return; | ||||||||
| 1157 | } | ||||||||
| 1158 | |||||||||
| 1159 | case PropertyImplStrategy::CopyStruct: | ||||||||
| 1160 | emitStructGetterCall(*this, ivar, strategy.isAtomic(), | ||||||||
| 1161 | strategy.hasStrongMember()); | ||||||||
| 1162 | return; | ||||||||
| 1163 | |||||||||
| 1164 | case PropertyImplStrategy::Expression: | ||||||||
| 1165 | case PropertyImplStrategy::SetPropertyAndExpressionGet: { | ||||||||
| 1166 | LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), ivar, 0); | ||||||||
| 1167 | |||||||||
| 1168 | QualType ivarType = ivar->getType(); | ||||||||
| 1169 | switch (getEvaluationKind(ivarType)) { | ||||||||
| 1170 | case TEK_Complex: { | ||||||||
| 1171 | ComplexPairTy pair = EmitLoadOfComplex(LV, SourceLocation()); | ||||||||
| 1172 | EmitStoreOfComplex(pair, MakeAddrLValue(ReturnValue, ivarType), | ||||||||
| 1173 | /*init*/ true); | ||||||||
| 1174 | return; | ||||||||
| 1175 | } | ||||||||
| 1176 | case TEK_Aggregate: { | ||||||||
| 1177 | // The return value slot is guaranteed to not be aliased, but | ||||||||
| 1178 | // that's not necessarily the same as "on the stack", so | ||||||||
| 1179 | // we still potentially need objc_memmove_collectable. | ||||||||
| 1180 | EmitAggregateCopy(/* Dest= */ MakeAddrLValue(ReturnValue, ivarType), | ||||||||
| 1181 | /* Src= */ LV, ivarType, getOverlapForReturnValue()); | ||||||||
| 1182 | return; | ||||||||
| 1183 | } | ||||||||
| 1184 | case TEK_Scalar: { | ||||||||
| 1185 | llvm::Value *value; | ||||||||
| 1186 | if (propType->isReferenceType()) { | ||||||||
| 1187 | value = LV.getAddress(*this).getPointer(); | ||||||||
| 1188 | } else { | ||||||||
| 1189 | // We want to load and autoreleaseReturnValue ARC __weak ivars. | ||||||||
| 1190 | if (LV.getQuals().getObjCLifetime() == Qualifiers::OCL_Weak) { | ||||||||
| 1191 | if (getLangOpts().ObjCAutoRefCount) { | ||||||||
| 1192 | value = emitARCRetainLoadOfScalar(*this, LV, ivarType); | ||||||||
| 1193 | } else { | ||||||||
| 1194 | value = EmitARCLoadWeak(LV.getAddress(*this)); | ||||||||
| 1195 | } | ||||||||
| 1196 | |||||||||
| 1197 | // Otherwise we want to do a simple load, suppressing the | ||||||||
| 1198 | // final autorelease. | ||||||||
| 1199 | } else { | ||||||||
| 1200 | value = EmitLoadOfLValue(LV, SourceLocation()).getScalarVal(); | ||||||||
| 1201 | AutoreleaseResult = false; | ||||||||
| 1202 | } | ||||||||
| 1203 | |||||||||
| 1204 | value = Builder.CreateBitCast( | ||||||||
| 1205 | value, ConvertType(GetterMethodDecl->getReturnType())); | ||||||||
| 1206 | } | ||||||||
| 1207 | |||||||||
| 1208 | EmitReturnOfRValue(RValue::get(value), propType); | ||||||||
| 1209 | return; | ||||||||
| 1210 | } | ||||||||
| 1211 | } | ||||||||
| 1212 | llvm_unreachable("bad evaluation kind")::llvm::llvm_unreachable_internal("bad evaluation kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 1212); | ||||||||
| 1213 | } | ||||||||
| 1214 | |||||||||
| 1215 | } | ||||||||
| 1216 | llvm_unreachable("bad @property implementation strategy!")::llvm::llvm_unreachable_internal("bad @property implementation strategy!" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 1216); | ||||||||
| 1217 | } | ||||||||
| 1218 | |||||||||
| 1219 | /// emitStructSetterCall - Call the runtime function to store the value | ||||||||
| 1220 | /// from the first formal parameter into the given ivar. | ||||||||
| 1221 | static void emitStructSetterCall(CodeGenFunction &CGF, ObjCMethodDecl *OMD, | ||||||||
| 1222 | ObjCIvarDecl *ivar) { | ||||||||
| 1223 | // objc_copyStruct (&structIvar, &Arg, | ||||||||
| 1224 | // sizeof (struct something), true, false); | ||||||||
| 1225 | CallArgList args; | ||||||||
| 1226 | |||||||||
| 1227 | // The first argument is the address of the ivar. | ||||||||
| 1228 | llvm::Value *ivarAddr = | ||||||||
| 1229 | CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), CGF.LoadObjCSelf(), ivar, 0) | ||||||||
| 1230 | .getPointer(CGF); | ||||||||
| 1231 | ivarAddr = CGF.Builder.CreateBitCast(ivarAddr, CGF.Int8PtrTy); | ||||||||
| 1232 | args.add(RValue::get(ivarAddr), CGF.getContext().VoidPtrTy); | ||||||||
| 1233 | |||||||||
| 1234 | // The second argument is the address of the parameter variable. | ||||||||
| 1235 | ParmVarDecl *argVar = *OMD->param_begin(); | ||||||||
| 1236 | DeclRefExpr argRef(CGF.getContext(), argVar, false, | ||||||||
| 1237 | argVar->getType().getNonReferenceType(), VK_LValue, | ||||||||
| 1238 | SourceLocation()); | ||||||||
| 1239 | llvm::Value *argAddr = CGF.EmitLValue(&argRef).getPointer(CGF); | ||||||||
| 1240 | argAddr = CGF.Builder.CreateBitCast(argAddr, CGF.Int8PtrTy); | ||||||||
| 1241 | args.add(RValue::get(argAddr), CGF.getContext().VoidPtrTy); | ||||||||
| 1242 | |||||||||
| 1243 | // The third argument is the sizeof the type. | ||||||||
| 1244 | llvm::Value *size = | ||||||||
| 1245 | CGF.CGM.getSize(CGF.getContext().getTypeSizeInChars(ivar->getType())); | ||||||||
| 1246 | args.add(RValue::get(size), CGF.getContext().getSizeType()); | ||||||||
| 1247 | |||||||||
| 1248 | // The fourth argument is the 'isAtomic' flag. | ||||||||
| 1249 | args.add(RValue::get(CGF.Builder.getTrue()), CGF.getContext().BoolTy); | ||||||||
| 1250 | |||||||||
| 1251 | // The fifth argument is the 'hasStrong' flag. | ||||||||
| 1252 | // FIXME: should this really always be false? | ||||||||
| 1253 | args.add(RValue::get(CGF.Builder.getFalse()), CGF.getContext().BoolTy); | ||||||||
| 1254 | |||||||||
| 1255 | llvm::FunctionCallee fn = CGF.CGM.getObjCRuntime().GetSetStructFunction(); | ||||||||
| 1256 | CGCallee callee = CGCallee::forDirect(fn); | ||||||||
| 1257 | CGF.EmitCall( | ||||||||
| 1258 | CGF.getTypes().arrangeBuiltinFunctionCall(CGF.getContext().VoidTy, args), | ||||||||
| 1259 | callee, ReturnValueSlot(), args); | ||||||||
| 1260 | } | ||||||||
| 1261 | |||||||||
| 1262 | /// emitCPPObjectAtomicSetterCall - Call the runtime function to store | ||||||||
| 1263 | /// the value from the first formal parameter into the given ivar, using | ||||||||
| 1264 | /// the Cpp API for atomic Cpp objects with non-trivial copy assignment. | ||||||||
| 1265 | static void emitCPPObjectAtomicSetterCall(CodeGenFunction &CGF, | ||||||||
| 1266 | ObjCMethodDecl *OMD, | ||||||||
| 1267 | ObjCIvarDecl *ivar, | ||||||||
| 1268 | llvm::Constant *AtomicHelperFn) { | ||||||||
| 1269 | // objc_copyCppObjectAtomic (&CppObjectIvar, &Arg, | ||||||||
| 1270 | // AtomicHelperFn); | ||||||||
| 1271 | CallArgList args; | ||||||||
| 1272 | |||||||||
| 1273 | // The first argument is the address of the ivar. | ||||||||
| 1274 | llvm::Value *ivarAddr = | ||||||||
| 1275 | CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), CGF.LoadObjCSelf(), ivar, 0) | ||||||||
| 1276 | .getPointer(CGF); | ||||||||
| 1277 | ivarAddr = CGF.Builder.CreateBitCast(ivarAddr, CGF.Int8PtrTy); | ||||||||
| 1278 | args.add(RValue::get(ivarAddr), CGF.getContext().VoidPtrTy); | ||||||||
| 1279 | |||||||||
| 1280 | // The second argument is the address of the parameter variable. | ||||||||
| 1281 | ParmVarDecl *argVar = *OMD->param_begin(); | ||||||||
| 1282 | DeclRefExpr argRef(CGF.getContext(), argVar, false, | ||||||||
| 1283 | argVar->getType().getNonReferenceType(), VK_LValue, | ||||||||
| 1284 | SourceLocation()); | ||||||||
| 1285 | llvm::Value *argAddr = CGF.EmitLValue(&argRef).getPointer(CGF); | ||||||||
| 1286 | argAddr = CGF.Builder.CreateBitCast(argAddr, CGF.Int8PtrTy); | ||||||||
| 1287 | args.add(RValue::get(argAddr), CGF.getContext().VoidPtrTy); | ||||||||
| 1288 | |||||||||
| 1289 | // Third argument is the helper function. | ||||||||
| 1290 | args.add(RValue::get(AtomicHelperFn), CGF.getContext().VoidPtrTy); | ||||||||
| 1291 | |||||||||
| 1292 | llvm::FunctionCallee fn = | ||||||||
| 1293 | CGF.CGM.getObjCRuntime().GetCppAtomicObjectSetFunction(); | ||||||||
| 1294 | CGCallee callee = CGCallee::forDirect(fn); | ||||||||
| 1295 | CGF.EmitCall( | ||||||||
| 1296 | CGF.getTypes().arrangeBuiltinFunctionCall(CGF.getContext().VoidTy, args), | ||||||||
| 1297 | callee, ReturnValueSlot(), args); | ||||||||
| 1298 | } | ||||||||
| 1299 | |||||||||
| 1300 | |||||||||
| 1301 | static bool hasTrivialSetExpr(const ObjCPropertyImplDecl *PID) { | ||||||||
| 1302 | Expr *setter = PID->getSetterCXXAssignment(); | ||||||||
| 1303 | if (!setter) return true; | ||||||||
| 1304 | |||||||||
| 1305 | // Sema only makes only of these when the ivar has a C++ class type, | ||||||||
| 1306 | // so the form is pretty constrained. | ||||||||
| 1307 | |||||||||
| 1308 | // An operator call is trivial if the function it calls is trivial. | ||||||||
| 1309 | // This also implies that there's nothing non-trivial going on with | ||||||||
| 1310 | // the arguments, because operator= can only be trivial if it's a | ||||||||
| 1311 | // synthesized assignment operator and therefore both parameters are | ||||||||
| 1312 | // references. | ||||||||
| 1313 | if (CallExpr *call = dyn_cast<CallExpr>(setter)) { | ||||||||
| 1314 | if (const FunctionDecl *callee | ||||||||
| 1315 | = dyn_cast_or_null<FunctionDecl>(call->getCalleeDecl())) | ||||||||
| 1316 | if (callee->isTrivial()) | ||||||||
| 1317 | return true; | ||||||||
| 1318 | return false; | ||||||||
| 1319 | } | ||||||||
| 1320 | |||||||||
| 1321 | assert(isa<ExprWithCleanups>(setter))((isa<ExprWithCleanups>(setter)) ? static_cast<void> (0) : __assert_fail ("isa<ExprWithCleanups>(setter)", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 1321, __PRETTY_FUNCTION__)); | ||||||||
| 1322 | return false; | ||||||||
| 1323 | } | ||||||||
| 1324 | |||||||||
| 1325 | static bool UseOptimizedSetter(CodeGenModule &CGM) { | ||||||||
| 1326 | if (CGM.getLangOpts().getGC() != LangOptions::NonGC) | ||||||||
| 1327 | return false; | ||||||||
| 1328 | return CGM.getLangOpts().ObjCRuntime.hasOptimizedSetter(); | ||||||||
| 1329 | } | ||||||||
| 1330 | |||||||||
| 1331 | void | ||||||||
| 1332 | CodeGenFunction::generateObjCSetterBody(const ObjCImplementationDecl *classImpl, | ||||||||
| 1333 | const ObjCPropertyImplDecl *propImpl, | ||||||||
| 1334 | llvm::Constant *AtomicHelperFn) { | ||||||||
| 1335 | ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); | ||||||||
| 1336 | ObjCMethodDecl *setterMethod = propImpl->getSetterMethodDecl(); | ||||||||
| 1337 | |||||||||
| 1338 | // Just use the setter expression if Sema gave us one and it's | ||||||||
| 1339 | // non-trivial. | ||||||||
| 1340 | if (!hasTrivialSetExpr(propImpl)) { | ||||||||
| 1341 | if (!AtomicHelperFn) | ||||||||
| 1342 | // If non-atomic, assignment is called directly. | ||||||||
| 1343 | EmitStmt(propImpl->getSetterCXXAssignment()); | ||||||||
| 1344 | else | ||||||||
| 1345 | // If atomic, assignment is called via a locking api. | ||||||||
| 1346 | emitCPPObjectAtomicSetterCall(*this, setterMethod, ivar, | ||||||||
| 1347 | AtomicHelperFn); | ||||||||
| 1348 | return; | ||||||||
| 1349 | } | ||||||||
| 1350 | |||||||||
| 1351 | PropertyImplStrategy strategy(CGM, propImpl); | ||||||||
| 1352 | switch (strategy.getKind()) { | ||||||||
| 1353 | case PropertyImplStrategy::Native: { | ||||||||
| 1354 | // We don't need to do anything for a zero-size struct. | ||||||||
| 1355 | if (strategy.getIvarSize().isZero()) | ||||||||
| 1356 | return; | ||||||||
| 1357 | |||||||||
| 1358 | Address argAddr = GetAddrOfLocalVar(*setterMethod->param_begin()); | ||||||||
| 1359 | |||||||||
| 1360 | LValue ivarLValue = | ||||||||
| 1361 | EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), ivar, /*quals*/ 0); | ||||||||
| 1362 | Address ivarAddr = ivarLValue.getAddress(*this); | ||||||||
| 1363 | |||||||||
| 1364 | // Currently, all atomic accesses have to be through integer | ||||||||
| 1365 | // types, so there's no point in trying to pick a prettier type. | ||||||||
| 1366 | llvm::Type *bitcastType = | ||||||||
| 1367 | llvm::Type::getIntNTy(getLLVMContext(), | ||||||||
| 1368 | getContext().toBits(strategy.getIvarSize())); | ||||||||
| 1369 | |||||||||
| 1370 | // Cast both arguments to the chosen operation type. | ||||||||
| 1371 | argAddr = Builder.CreateElementBitCast(argAddr, bitcastType); | ||||||||
| 1372 | ivarAddr = Builder.CreateElementBitCast(ivarAddr, bitcastType); | ||||||||
| 1373 | |||||||||
| 1374 | // This bitcast load is likely to cause some nasty IR. | ||||||||
| 1375 | llvm::Value *load = Builder.CreateLoad(argAddr); | ||||||||
| 1376 | |||||||||
| 1377 | // Perform an atomic store. There are no memory ordering requirements. | ||||||||
| 1378 | llvm::StoreInst *store = Builder.CreateStore(load, ivarAddr); | ||||||||
| 1379 | store->setAtomic(llvm::AtomicOrdering::Unordered); | ||||||||
| 1380 | return; | ||||||||
| 1381 | } | ||||||||
| 1382 | |||||||||
| 1383 | case PropertyImplStrategy::GetSetProperty: | ||||||||
| 1384 | case PropertyImplStrategy::SetPropertyAndExpressionGet: { | ||||||||
| 1385 | |||||||||
| 1386 | llvm::FunctionCallee setOptimizedPropertyFn = nullptr; | ||||||||
| 1387 | llvm::FunctionCallee setPropertyFn = nullptr; | ||||||||
| 1388 | if (UseOptimizedSetter(CGM)) { | ||||||||
| 1389 | // 10.8 and iOS 6.0 code and GC is off | ||||||||
| 1390 | setOptimizedPropertyFn = | ||||||||
| 1391 | CGM.getObjCRuntime().GetOptimizedPropertySetFunction( | ||||||||
| 1392 | strategy.isAtomic(), strategy.isCopy()); | ||||||||
| 1393 | if (!setOptimizedPropertyFn) { | ||||||||
| 1394 | CGM.ErrorUnsupported(propImpl, "Obj-C optimized setter - NYI"); | ||||||||
| 1395 | return; | ||||||||
| 1396 | } | ||||||||
| 1397 | } | ||||||||
| 1398 | else { | ||||||||
| 1399 | setPropertyFn = CGM.getObjCRuntime().GetPropertySetFunction(); | ||||||||
| 1400 | if (!setPropertyFn) { | ||||||||
| 1401 | CGM.ErrorUnsupported(propImpl, "Obj-C setter requiring atomic copy"); | ||||||||
| 1402 | return; | ||||||||
| 1403 | } | ||||||||
| 1404 | } | ||||||||
| 1405 | |||||||||
| 1406 | // Emit objc_setProperty((id) self, _cmd, offset, arg, | ||||||||
| 1407 | // <is-atomic>, <is-copy>). | ||||||||
| 1408 | llvm::Value *cmd = | ||||||||
| 1409 | Builder.CreateLoad(GetAddrOfLocalVar(setterMethod->getCmdDecl())); | ||||||||
| 1410 | llvm::Value *self = | ||||||||
| 1411 | Builder.CreateBitCast(LoadObjCSelf(), VoidPtrTy); | ||||||||
| 1412 | llvm::Value *ivarOffset = | ||||||||
| 1413 | EmitIvarOffset(classImpl->getClassInterface(), ivar); | ||||||||
| 1414 | Address argAddr = GetAddrOfLocalVar(*setterMethod->param_begin()); | ||||||||
| 1415 | llvm::Value *arg = Builder.CreateLoad(argAddr, "arg"); | ||||||||
| 1416 | arg = Builder.CreateBitCast(arg, VoidPtrTy); | ||||||||
| 1417 | |||||||||
| 1418 | CallArgList args; | ||||||||
| 1419 | args.add(RValue::get(self), getContext().getObjCIdType()); | ||||||||
| 1420 | args.add(RValue::get(cmd), getContext().getObjCSelType()); | ||||||||
| 1421 | if (setOptimizedPropertyFn) { | ||||||||
| 1422 | args.add(RValue::get(arg), getContext().getObjCIdType()); | ||||||||
| 1423 | args.add(RValue::get(ivarOffset), getContext().getPointerDiffType()); | ||||||||
| 1424 | CGCallee callee = CGCallee::forDirect(setOptimizedPropertyFn); | ||||||||
| 1425 | EmitCall(getTypes().arrangeBuiltinFunctionCall(getContext().VoidTy, args), | ||||||||
| 1426 | callee, ReturnValueSlot(), args); | ||||||||
| 1427 | } else { | ||||||||
| 1428 | args.add(RValue::get(ivarOffset), getContext().getPointerDiffType()); | ||||||||
| 1429 | args.add(RValue::get(arg), getContext().getObjCIdType()); | ||||||||
| 1430 | args.add(RValue::get(Builder.getInt1(strategy.isAtomic())), | ||||||||
| 1431 | getContext().BoolTy); | ||||||||
| 1432 | args.add(RValue::get(Builder.getInt1(strategy.isCopy())), | ||||||||
| 1433 | getContext().BoolTy); | ||||||||
| 1434 | // FIXME: We shouldn't need to get the function info here, the runtime | ||||||||
| 1435 | // already should have computed it to build the function. | ||||||||
| 1436 | CGCallee callee = CGCallee::forDirect(setPropertyFn); | ||||||||
| 1437 | EmitCall(getTypes().arrangeBuiltinFunctionCall(getContext().VoidTy, args), | ||||||||
| 1438 | callee, ReturnValueSlot(), args); | ||||||||
| 1439 | } | ||||||||
| 1440 | |||||||||
| 1441 | return; | ||||||||
| 1442 | } | ||||||||
| 1443 | |||||||||
| 1444 | case PropertyImplStrategy::CopyStruct: | ||||||||
| 1445 | emitStructSetterCall(*this, setterMethod, ivar); | ||||||||
| 1446 | return; | ||||||||
| 1447 | |||||||||
| 1448 | case PropertyImplStrategy::Expression: | ||||||||
| 1449 | break; | ||||||||
| 1450 | } | ||||||||
| 1451 | |||||||||
| 1452 | // Otherwise, fake up some ASTs and emit a normal assignment. | ||||||||
| 1453 | ValueDecl *selfDecl = setterMethod->getSelfDecl(); | ||||||||
| 1454 | DeclRefExpr self(getContext(), selfDecl, false, selfDecl->getType(), | ||||||||
| 1455 | VK_LValue, SourceLocation()); | ||||||||
| 1456 | ImplicitCastExpr selfLoad(ImplicitCastExpr::OnStack, | ||||||||
| 1457 | selfDecl->getType(), CK_LValueToRValue, &self, | ||||||||
| 1458 | VK_RValue); | ||||||||
| 1459 | ObjCIvarRefExpr ivarRef(ivar, ivar->getType().getNonReferenceType(), | ||||||||
| 1460 | SourceLocation(), SourceLocation(), | ||||||||
| 1461 | &selfLoad, true, true); | ||||||||
| 1462 | |||||||||
| 1463 | ParmVarDecl *argDecl = *setterMethod->param_begin(); | ||||||||
| 1464 | QualType argType = argDecl->getType().getNonReferenceType(); | ||||||||
| 1465 | DeclRefExpr arg(getContext(), argDecl, false, argType, VK_LValue, | ||||||||
| 1466 | SourceLocation()); | ||||||||
| 1467 | ImplicitCastExpr argLoad(ImplicitCastExpr::OnStack, | ||||||||
| 1468 | argType.getUnqualifiedType(), CK_LValueToRValue, | ||||||||
| 1469 | &arg, VK_RValue); | ||||||||
| 1470 | |||||||||
| 1471 | // The property type can differ from the ivar type in some situations with | ||||||||
| 1472 | // Objective-C pointer types, we can always bit cast the RHS in these cases. | ||||||||
| 1473 | // The following absurdity is just to ensure well-formed IR. | ||||||||
| 1474 | CastKind argCK = CK_NoOp; | ||||||||
| 1475 | if (ivarRef.getType()->isObjCObjectPointerType()) { | ||||||||
| 1476 | if (argLoad.getType()->isObjCObjectPointerType()) | ||||||||
| 1477 | argCK = CK_BitCast; | ||||||||
| 1478 | else if (argLoad.getType()->isBlockPointerType()) | ||||||||
| 1479 | argCK = CK_BlockPointerToObjCPointerCast; | ||||||||
| 1480 | else | ||||||||
| 1481 | argCK = CK_CPointerToObjCPointerCast; | ||||||||
| 1482 | } else if (ivarRef.getType()->isBlockPointerType()) { | ||||||||
| 1483 | if (argLoad.getType()->isBlockPointerType()) | ||||||||
| 1484 | argCK = CK_BitCast; | ||||||||
| 1485 | else | ||||||||
| 1486 | argCK = CK_AnyPointerToBlockPointerCast; | ||||||||
| 1487 | } else if (ivarRef.getType()->isPointerType()) { | ||||||||
| 1488 | argCK = CK_BitCast; | ||||||||
| 1489 | } | ||||||||
| 1490 | ImplicitCastExpr argCast(ImplicitCastExpr::OnStack, | ||||||||
| 1491 | ivarRef.getType(), argCK, &argLoad, | ||||||||
| 1492 | VK_RValue); | ||||||||
| 1493 | Expr *finalArg = &argLoad; | ||||||||
| 1494 | if (!getContext().hasSameUnqualifiedType(ivarRef.getType(), | ||||||||
| 1495 | argLoad.getType())) | ||||||||
| 1496 | finalArg = &argCast; | ||||||||
| 1497 | |||||||||
| 1498 | |||||||||
| 1499 | BinaryOperator assign(&ivarRef, finalArg, BO_Assign, | ||||||||
| 1500 | ivarRef.getType(), VK_RValue, OK_Ordinary, | ||||||||
| 1501 | SourceLocation(), FPOptions()); | ||||||||
| 1502 | EmitStmt(&assign); | ||||||||
| 1503 | } | ||||||||
| 1504 | |||||||||
| 1505 | /// Generate an Objective-C property setter function. | ||||||||
| 1506 | /// | ||||||||
| 1507 | /// The given Decl must be an ObjCImplementationDecl. \@synthesize | ||||||||
| 1508 | /// is illegal within a category. | ||||||||
| 1509 | void CodeGenFunction::GenerateObjCSetter(ObjCImplementationDecl *IMP, | ||||||||
| 1510 | const ObjCPropertyImplDecl *PID) { | ||||||||
| 1511 | llvm::Constant *AtomicHelperFn = | ||||||||
| 1512 | CodeGenFunction(CGM).GenerateObjCAtomicSetterCopyHelperFunction(PID); | ||||||||
| 1513 | ObjCMethodDecl *OMD = PID->getSetterMethodDecl(); | ||||||||
| 1514 | assert(OMD && "Invalid call to generate setter (empty method)")((OMD && "Invalid call to generate setter (empty method)" ) ? static_cast<void> (0) : __assert_fail ("OMD && \"Invalid call to generate setter (empty method)\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 1514, __PRETTY_FUNCTION__)); | ||||||||
| 1515 | StartObjCMethod(OMD, IMP->getClassInterface()); | ||||||||
| 1516 | |||||||||
| 1517 | generateObjCSetterBody(IMP, PID, AtomicHelperFn); | ||||||||
| 1518 | |||||||||
| 1519 | FinishFunction(OMD->getEndLoc()); | ||||||||
| 1520 | } | ||||||||
| 1521 | |||||||||
| 1522 | namespace { | ||||||||
| 1523 | struct DestroyIvar final : EHScopeStack::Cleanup { | ||||||||
| 1524 | private: | ||||||||
| 1525 | llvm::Value *addr; | ||||||||
| 1526 | const ObjCIvarDecl *ivar; | ||||||||
| 1527 | CodeGenFunction::Destroyer *destroyer; | ||||||||
| 1528 | bool useEHCleanupForArray; | ||||||||
| 1529 | public: | ||||||||
| 1530 | DestroyIvar(llvm::Value *addr, const ObjCIvarDecl *ivar, | ||||||||
| 1531 | CodeGenFunction::Destroyer *destroyer, | ||||||||
| 1532 | bool useEHCleanupForArray) | ||||||||
| 1533 | : addr(addr), ivar(ivar), destroyer(destroyer), | ||||||||
| 1534 | useEHCleanupForArray(useEHCleanupForArray) {} | ||||||||
| 1535 | |||||||||
| 1536 | void Emit(CodeGenFunction &CGF, Flags flags) override { | ||||||||
| 1537 | LValue lvalue | ||||||||
| 1538 | = CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), addr, ivar, /*CVR*/ 0); | ||||||||
| 1539 | CGF.emitDestroy(lvalue.getAddress(CGF), ivar->getType(), destroyer, | ||||||||
| 1540 | flags.isForNormalCleanup() && useEHCleanupForArray); | ||||||||
| 1541 | } | ||||||||
| 1542 | }; | ||||||||
| 1543 | } | ||||||||
| 1544 | |||||||||
| 1545 | /// Like CodeGenFunction::destroyARCStrong, but do it with a call. | ||||||||
| 1546 | static void destroyARCStrongWithStore(CodeGenFunction &CGF, | ||||||||
| 1547 | Address addr, | ||||||||
| 1548 | QualType type) { | ||||||||
| 1549 | llvm::Value *null = getNullForVariable(addr); | ||||||||
| 1550 | CGF.EmitARCStoreStrongCall(addr, null, /*ignored*/ true); | ||||||||
| 1551 | } | ||||||||
| 1552 | |||||||||
| 1553 | static void emitCXXDestructMethod(CodeGenFunction &CGF, | ||||||||
| 1554 | ObjCImplementationDecl *impl) { | ||||||||
| 1555 | CodeGenFunction::RunCleanupsScope scope(CGF); | ||||||||
| 1556 | |||||||||
| 1557 | llvm::Value *self = CGF.LoadObjCSelf(); | ||||||||
| 1558 | |||||||||
| 1559 | const ObjCInterfaceDecl *iface = impl->getClassInterface(); | ||||||||
| 1560 | for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); | ||||||||
| 1561 | ivar; ivar = ivar->getNextIvar()) { | ||||||||
| 1562 | QualType type = ivar->getType(); | ||||||||
| 1563 | |||||||||
| 1564 | // Check whether the ivar is a destructible type. | ||||||||
| 1565 | QualType::DestructionKind dtorKind = type.isDestructedType(); | ||||||||
| 1566 | if (!dtorKind) continue; | ||||||||
| 1567 | |||||||||
| 1568 | CodeGenFunction::Destroyer *destroyer = nullptr; | ||||||||
| 1569 | |||||||||
| 1570 | // Use a call to objc_storeStrong to destroy strong ivars, for the | ||||||||
| 1571 | // general benefit of the tools. | ||||||||
| 1572 | if (dtorKind == QualType::DK_objc_strong_lifetime) { | ||||||||
| 1573 | destroyer = destroyARCStrongWithStore; | ||||||||
| 1574 | |||||||||
| 1575 | // Otherwise use the default for the destruction kind. | ||||||||
| 1576 | } else { | ||||||||
| 1577 | destroyer = CGF.getDestroyer(dtorKind); | ||||||||
| 1578 | } | ||||||||
| 1579 | |||||||||
| 1580 | CleanupKind cleanupKind = CGF.getCleanupKind(dtorKind); | ||||||||
| 1581 | |||||||||
| 1582 | CGF.EHStack.pushCleanup<DestroyIvar>(cleanupKind, self, ivar, destroyer, | ||||||||
| 1583 | cleanupKind & EHCleanup); | ||||||||
| 1584 | } | ||||||||
| 1585 | |||||||||
| 1586 | assert(scope.requiresCleanups() && "nothing to do in .cxx_destruct?")((scope.requiresCleanups() && "nothing to do in .cxx_destruct?" ) ? static_cast<void> (0) : __assert_fail ("scope.requiresCleanups() && \"nothing to do in .cxx_destruct?\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 1586, __PRETTY_FUNCTION__)); | ||||||||
| 1587 | } | ||||||||
| 1588 | |||||||||
| 1589 | void CodeGenFunction::GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP, | ||||||||
| 1590 | ObjCMethodDecl *MD, | ||||||||
| 1591 | bool ctor) { | ||||||||
| 1592 | MD->createImplicitParams(CGM.getContext(), IMP->getClassInterface()); | ||||||||
| 1593 | StartObjCMethod(MD, IMP->getClassInterface()); | ||||||||
| 1594 | |||||||||
| 1595 | // Emit .cxx_construct. | ||||||||
| 1596 | if (ctor) { | ||||||||
| 1597 | // Suppress the final autorelease in ARC. | ||||||||
| 1598 | AutoreleaseResult = false; | ||||||||
| 1599 | |||||||||
| 1600 | for (const auto *IvarInit : IMP->inits()) { | ||||||||
| 1601 | FieldDecl *Field = IvarInit->getAnyMember(); | ||||||||
| 1602 | ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(Field); | ||||||||
| 1603 | LValue LV = EmitLValueForIvar(TypeOfSelfObject(), | ||||||||
| 1604 | LoadObjCSelf(), Ivar, 0); | ||||||||
| 1605 | EmitAggExpr(IvarInit->getInit(), | ||||||||
| 1606 | AggValueSlot::forLValue(LV, *this, AggValueSlot::IsDestructed, | ||||||||
| 1607 | AggValueSlot::DoesNotNeedGCBarriers, | ||||||||
| 1608 | AggValueSlot::IsNotAliased, | ||||||||
| 1609 | AggValueSlot::DoesNotOverlap)); | ||||||||
| 1610 | } | ||||||||
| 1611 | // constructor returns 'self'. | ||||||||
| 1612 | CodeGenTypes &Types = CGM.getTypes(); | ||||||||
| 1613 | QualType IdTy(CGM.getContext().getObjCIdType()); | ||||||||
| 1614 | llvm::Value *SelfAsId = | ||||||||
| 1615 | Builder.CreateBitCast(LoadObjCSelf(), Types.ConvertType(IdTy)); | ||||||||
| 1616 | EmitReturnOfRValue(RValue::get(SelfAsId), IdTy); | ||||||||
| 1617 | |||||||||
| 1618 | // Emit .cxx_destruct. | ||||||||
| 1619 | } else { | ||||||||
| 1620 | emitCXXDestructMethod(*this, IMP); | ||||||||
| 1621 | } | ||||||||
| 1622 | FinishFunction(); | ||||||||
| 1623 | } | ||||||||
| 1624 | |||||||||
| 1625 | llvm::Value *CodeGenFunction::LoadObjCSelf() { | ||||||||
| 1626 | VarDecl *Self = cast<ObjCMethodDecl>(CurFuncDecl)->getSelfDecl(); | ||||||||
| 1627 | DeclRefExpr DRE(getContext(), Self, | ||||||||
| 1628 | /*is enclosing local*/ (CurFuncDecl != CurCodeDecl), | ||||||||
| 1629 | Self->getType(), VK_LValue, SourceLocation()); | ||||||||
| 1630 | return EmitLoadOfScalar(EmitDeclRefLValue(&DRE), SourceLocation()); | ||||||||
| 1631 | } | ||||||||
| 1632 | |||||||||
| 1633 | QualType CodeGenFunction::TypeOfSelfObject() { | ||||||||
| 1634 | const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); | ||||||||
| 1635 | ImplicitParamDecl *selfDecl = OMD->getSelfDecl(); | ||||||||
| 1636 | const ObjCObjectPointerType *PTy = cast<ObjCObjectPointerType>( | ||||||||
| 1637 | getContext().getCanonicalType(selfDecl->getType())); | ||||||||
| 1638 | return PTy->getPointeeType(); | ||||||||
| 1639 | } | ||||||||
| 1640 | |||||||||
| 1641 | void CodeGenFunction::EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S){ | ||||||||
| 1642 | llvm::FunctionCallee EnumerationMutationFnPtr = | ||||||||
| 1643 | CGM.getObjCRuntime().EnumerationMutationFunction(); | ||||||||
| 1644 | if (!EnumerationMutationFnPtr) { | ||||||||
| 1645 | CGM.ErrorUnsupported(&S, "Obj-C fast enumeration for this runtime"); | ||||||||
| 1646 | return; | ||||||||
| 1647 | } | ||||||||
| 1648 | CGCallee EnumerationMutationFn = | ||||||||
| 1649 | CGCallee::forDirect(EnumerationMutationFnPtr); | ||||||||
| 1650 | |||||||||
| 1651 | CGDebugInfo *DI = getDebugInfo(); | ||||||||
| 1652 | if (DI) | ||||||||
| 1653 | DI->EmitLexicalBlockStart(Builder, S.getSourceRange().getBegin()); | ||||||||
| 1654 | |||||||||
| 1655 | RunCleanupsScope ForScope(*this); | ||||||||
| 1656 | |||||||||
| 1657 | // The local variable comes into scope immediately. | ||||||||
| 1658 | AutoVarEmission variable = AutoVarEmission::invalid(); | ||||||||
| 1659 | if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) | ||||||||
| 1660 | variable = EmitAutoVarAlloca(*cast<VarDecl>(SD->getSingleDecl())); | ||||||||
| 1661 | |||||||||
| 1662 | JumpDest LoopEnd = getJumpDestInCurrentScope("forcoll.end"); | ||||||||
| 1663 | |||||||||
| 1664 | // Fast enumeration state. | ||||||||
| 1665 | QualType StateTy = CGM.getObjCFastEnumerationStateType(); | ||||||||
| 1666 | Address StatePtr = CreateMemTemp(StateTy, "state.ptr"); | ||||||||
| 1667 | EmitNullInitialization(StatePtr, StateTy); | ||||||||
| 1668 | |||||||||
| 1669 | // Number of elements in the items array. | ||||||||
| 1670 | static const unsigned NumItems = 16; | ||||||||
| 1671 | |||||||||
| 1672 | // Fetch the countByEnumeratingWithState:objects:count: selector. | ||||||||
| 1673 | IdentifierInfo *II[] = { | ||||||||
| 1674 | &CGM.getContext().Idents.get("countByEnumeratingWithState"), | ||||||||
| 1675 | &CGM.getContext().Idents.get("objects"), | ||||||||
| 1676 | &CGM.getContext().Idents.get("count") | ||||||||
| 1677 | }; | ||||||||
| 1678 | Selector FastEnumSel = | ||||||||
| 1679 | CGM.getContext().Selectors.getSelector(llvm::array_lengthof(II), &II[0]); | ||||||||
| 1680 | |||||||||
| 1681 | QualType ItemsTy = | ||||||||
| 1682 | getContext().getConstantArrayType(getContext().getObjCIdType(), | ||||||||
| 1683 | llvm::APInt(32, NumItems), nullptr, | ||||||||
| 1684 | ArrayType::Normal, 0); | ||||||||
| 1685 | Address ItemsPtr = CreateMemTemp(ItemsTy, "items.ptr"); | ||||||||
| 1686 | |||||||||
| 1687 | // Emit the collection pointer. In ARC, we do a retain. | ||||||||
| 1688 | llvm::Value *Collection; | ||||||||
| 1689 | if (getLangOpts().ObjCAutoRefCount) { | ||||||||
| 1690 | Collection = EmitARCRetainScalarExpr(S.getCollection()); | ||||||||
| 1691 | |||||||||
| 1692 | // Enter a cleanup to do the release. | ||||||||
| 1693 | EmitObjCConsumeObject(S.getCollection()->getType(), Collection); | ||||||||
| 1694 | } else { | ||||||||
| 1695 | Collection = EmitScalarExpr(S.getCollection()); | ||||||||
| 1696 | } | ||||||||
| 1697 | |||||||||
| 1698 | // The 'continue' label needs to appear within the cleanup for the | ||||||||
| 1699 | // collection object. | ||||||||
| 1700 | JumpDest AfterBody = getJumpDestInCurrentScope("forcoll.next"); | ||||||||
| 1701 | |||||||||
| 1702 | // Send it our message: | ||||||||
| 1703 | CallArgList Args; | ||||||||
| 1704 | |||||||||
| 1705 | // The first argument is a temporary of the enumeration-state type. | ||||||||
| 1706 | Args.add(RValue::get(StatePtr.getPointer()), | ||||||||
| 1707 | getContext().getPointerType(StateTy)); | ||||||||
| 1708 | |||||||||
| 1709 | // The second argument is a temporary array with space for NumItems | ||||||||
| 1710 | // pointers. We'll actually be loading elements from the array | ||||||||
| 1711 | // pointer written into the control state; this buffer is so that | ||||||||
| 1712 | // collections that *aren't* backed by arrays can still queue up | ||||||||
| 1713 | // batches of elements. | ||||||||
| 1714 | Args.add(RValue::get(ItemsPtr.getPointer()), | ||||||||
| 1715 | getContext().getPointerType(ItemsTy)); | ||||||||
| 1716 | |||||||||
| 1717 | // The third argument is the capacity of that temporary array. | ||||||||
| 1718 | llvm::Type *NSUIntegerTy = ConvertType(getContext().getNSUIntegerType()); | ||||||||
| 1719 | llvm::Constant *Count = llvm::ConstantInt::get(NSUIntegerTy, NumItems); | ||||||||
| 1720 | Args.add(RValue::get(Count), getContext().getNSUIntegerType()); | ||||||||
| 1721 | |||||||||
| 1722 | // Start the enumeration. | ||||||||
| 1723 | RValue CountRV = | ||||||||
| 1724 | CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), | ||||||||
| 1725 | getContext().getNSUIntegerType(), | ||||||||
| 1726 | FastEnumSel, Collection, Args); | ||||||||
| 1727 | |||||||||
| 1728 | // The initial number of objects that were returned in the buffer. | ||||||||
| 1729 | llvm::Value *initialBufferLimit = CountRV.getScalarVal(); | ||||||||
| 1730 | |||||||||
| 1731 | llvm::BasicBlock *EmptyBB = createBasicBlock("forcoll.empty"); | ||||||||
| 1732 | llvm::BasicBlock *LoopInitBB = createBasicBlock("forcoll.loopinit"); | ||||||||
| 1733 | |||||||||
| 1734 | llvm::Value *zero = llvm::Constant::getNullValue(NSUIntegerTy); | ||||||||
| 1735 | |||||||||
| 1736 | // If the limit pointer was zero to begin with, the collection is | ||||||||
| 1737 | // empty; skip all this. Set the branch weight assuming this has the same | ||||||||
| 1738 | // probability of exiting the loop as any other loop exit. | ||||||||
| 1739 | uint64_t EntryCount = getCurrentProfileCount(); | ||||||||
| 1740 | Builder.CreateCondBr( | ||||||||
| 1741 | Builder.CreateICmpEQ(initialBufferLimit, zero, "iszero"), EmptyBB, | ||||||||
| 1742 | LoopInitBB, | ||||||||
| 1743 | createProfileWeights(EntryCount, getProfileCount(S.getBody()))); | ||||||||
| 1744 | |||||||||
| 1745 | // Otherwise, initialize the loop. | ||||||||
| 1746 | EmitBlock(LoopInitBB); | ||||||||
| 1747 | |||||||||
| 1748 | // Save the initial mutations value. This is the value at an | ||||||||
| 1749 | // address that was written into the state object by | ||||||||
| 1750 | // countByEnumeratingWithState:objects:count:. | ||||||||
| 1751 | Address StateMutationsPtrPtr = | ||||||||
| 1752 | Builder.CreateStructGEP(StatePtr, 2, "mutationsptr.ptr"); | ||||||||
| 1753 | llvm::Value *StateMutationsPtr | ||||||||
| 1754 | = Builder.CreateLoad(StateMutationsPtrPtr, "mutationsptr"); | ||||||||
| 1755 | |||||||||
| 1756 | llvm::Value *initialMutations = | ||||||||
| 1757 | Builder.CreateAlignedLoad(StateMutationsPtr, getPointerAlign(), | ||||||||
| 1758 | "forcoll.initial-mutations"); | ||||||||
| 1759 | |||||||||
| 1760 | // Start looping. This is the point we return to whenever we have a | ||||||||
| 1761 | // fresh, non-empty batch of objects. | ||||||||
| 1762 | llvm::BasicBlock *LoopBodyBB = createBasicBlock("forcoll.loopbody"); | ||||||||
| 1763 | EmitBlock(LoopBodyBB); | ||||||||
| 1764 | |||||||||
| 1765 | // The current index into the buffer. | ||||||||
| 1766 | llvm::PHINode *index = Builder.CreatePHI(NSUIntegerTy, 3, "forcoll.index"); | ||||||||
| 1767 | index->addIncoming(zero, LoopInitBB); | ||||||||
| 1768 | |||||||||
| 1769 | // The current buffer size. | ||||||||
| 1770 | llvm::PHINode *count = Builder.CreatePHI(NSUIntegerTy, 3, "forcoll.count"); | ||||||||
| 1771 | count->addIncoming(initialBufferLimit, LoopInitBB); | ||||||||
| 1772 | |||||||||
| 1773 | incrementProfileCounter(&S); | ||||||||
| 1774 | |||||||||
| 1775 | // Check whether the mutations value has changed from where it was | ||||||||
| 1776 | // at start. StateMutationsPtr should actually be invariant between | ||||||||
| 1777 | // refreshes. | ||||||||
| 1778 | StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, "mutationsptr"); | ||||||||
| 1779 | llvm::Value *currentMutations | ||||||||
| 1780 | = Builder.CreateAlignedLoad(StateMutationsPtr, getPointerAlign(), | ||||||||
| 1781 | "statemutations"); | ||||||||
| 1782 | |||||||||
| 1783 | llvm::BasicBlock *WasMutatedBB = createBasicBlock("forcoll.mutated"); | ||||||||
| 1784 | llvm::BasicBlock *WasNotMutatedBB = createBasicBlock("forcoll.notmutated"); | ||||||||
| 1785 | |||||||||
| 1786 | Builder.CreateCondBr(Builder.CreateICmpEQ(currentMutations, initialMutations), | ||||||||
| 1787 | WasNotMutatedBB, WasMutatedBB); | ||||||||
| 1788 | |||||||||
| 1789 | // If so, call the enumeration-mutation function. | ||||||||
| 1790 | EmitBlock(WasMutatedBB); | ||||||||
| 1791 | llvm::Value *V = | ||||||||
| 1792 | Builder.CreateBitCast(Collection, | ||||||||
| 1793 | ConvertType(getContext().getObjCIdType())); | ||||||||
| 1794 | CallArgList Args2; | ||||||||
| 1795 | Args2.add(RValue::get(V), getContext().getObjCIdType()); | ||||||||
| 1796 | // FIXME: We shouldn't need to get the function info here, the runtime already | ||||||||
| 1797 | // should have computed it to build the function. | ||||||||
| 1798 | EmitCall( | ||||||||
| 1799 | CGM.getTypes().arrangeBuiltinFunctionCall(getContext().VoidTy, Args2), | ||||||||
| 1800 | EnumerationMutationFn, ReturnValueSlot(), Args2); | ||||||||
| 1801 | |||||||||
| 1802 | // Otherwise, or if the mutation function returns, just continue. | ||||||||
| 1803 | EmitBlock(WasNotMutatedBB); | ||||||||
| 1804 | |||||||||
| 1805 | // Initialize the element variable. | ||||||||
| 1806 | RunCleanupsScope elementVariableScope(*this); | ||||||||
| 1807 | bool elementIsVariable; | ||||||||
| 1808 | LValue elementLValue; | ||||||||
| 1809 | QualType elementType; | ||||||||
| 1810 | if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) { | ||||||||
| 1811 | // Initialize the variable, in case it's a __block variable or something. | ||||||||
| 1812 | EmitAutoVarInit(variable); | ||||||||
| 1813 | |||||||||
| 1814 | const VarDecl *D = cast<VarDecl>(SD->getSingleDecl()); | ||||||||
| 1815 | DeclRefExpr tempDRE(getContext(), const_cast<VarDecl *>(D), false, | ||||||||
| 1816 | D->getType(), VK_LValue, SourceLocation()); | ||||||||
| 1817 | elementLValue = EmitLValue(&tempDRE); | ||||||||
| 1818 | elementType = D->getType(); | ||||||||
| 1819 | elementIsVariable = true; | ||||||||
| 1820 | |||||||||
| 1821 | if (D->isARCPseudoStrong()) | ||||||||
| 1822 | elementLValue.getQuals().setObjCLifetime(Qualifiers::OCL_ExplicitNone); | ||||||||
| 1823 | } else { | ||||||||
| 1824 | elementLValue = LValue(); // suppress warning | ||||||||
| 1825 | elementType = cast<Expr>(S.getElement())->getType(); | ||||||||
| 1826 | elementIsVariable = false; | ||||||||
| 1827 | } | ||||||||
| 1828 | llvm::Type *convertedElementType = ConvertType(elementType); | ||||||||
| 1829 | |||||||||
| 1830 | // Fetch the buffer out of the enumeration state. | ||||||||
| 1831 | // TODO: this pointer should actually be invariant between | ||||||||
| 1832 | // refreshes, which would help us do certain loop optimizations. | ||||||||
| 1833 | Address StateItemsPtr = | ||||||||
| 1834 | Builder.CreateStructGEP(StatePtr, 1, "stateitems.ptr"); | ||||||||
| 1835 | llvm::Value *EnumStateItems = | ||||||||
| 1836 | Builder.CreateLoad(StateItemsPtr, "stateitems"); | ||||||||
| 1837 | |||||||||
| 1838 | // Fetch the value at the current index from the buffer. | ||||||||
| 1839 | llvm::Value *CurrentItemPtr = | ||||||||
| 1840 | Builder.CreateGEP(EnumStateItems, index, "currentitem.ptr"); | ||||||||
| 1841 | llvm::Value *CurrentItem = | ||||||||
| 1842 | Builder.CreateAlignedLoad(CurrentItemPtr, getPointerAlign()); | ||||||||
| 1843 | |||||||||
| 1844 | // Cast that value to the right type. | ||||||||
| 1845 | CurrentItem = Builder.CreateBitCast(CurrentItem, convertedElementType, | ||||||||
| 1846 | "currentitem"); | ||||||||
| 1847 | |||||||||
| 1848 | // Make sure we have an l-value. Yes, this gets evaluated every | ||||||||
| 1849 | // time through the loop. | ||||||||
| 1850 | if (!elementIsVariable) { | ||||||||
| 1851 | elementLValue = EmitLValue(cast<Expr>(S.getElement())); | ||||||||
| 1852 | EmitStoreThroughLValue(RValue::get(CurrentItem), elementLValue); | ||||||||
| 1853 | } else { | ||||||||
| 1854 | EmitStoreThroughLValue(RValue::get(CurrentItem), elementLValue, | ||||||||
| 1855 | /*isInit*/ true); | ||||||||
| 1856 | } | ||||||||
| 1857 | |||||||||
| 1858 | // If we do have an element variable, this assignment is the end of | ||||||||
| 1859 | // its initialization. | ||||||||
| 1860 | if (elementIsVariable) | ||||||||
| 1861 | EmitAutoVarCleanups(variable); | ||||||||
| 1862 | |||||||||
| 1863 | // Perform the loop body, setting up break and continue labels. | ||||||||
| 1864 | BreakContinueStack.push_back(BreakContinue(LoopEnd, AfterBody)); | ||||||||
| 1865 | { | ||||||||
| 1866 | RunCleanupsScope Scope(*this); | ||||||||
| 1867 | EmitStmt(S.getBody()); | ||||||||
| 1868 | } | ||||||||
| 1869 | BreakContinueStack.pop_back(); | ||||||||
| 1870 | |||||||||
| 1871 | // Destroy the element variable now. | ||||||||
| 1872 | elementVariableScope.ForceCleanup(); | ||||||||
| 1873 | |||||||||
| 1874 | // Check whether there are more elements. | ||||||||
| 1875 | EmitBlock(AfterBody.getBlock()); | ||||||||
| 1876 | |||||||||
| 1877 | llvm::BasicBlock *FetchMoreBB = createBasicBlock("forcoll.refetch"); | ||||||||
| 1878 | |||||||||
| 1879 | // First we check in the local buffer. | ||||||||
| 1880 | llvm::Value *indexPlusOne = | ||||||||
| 1881 | Builder.CreateAdd(index, llvm::ConstantInt::get(NSUIntegerTy, 1)); | ||||||||
| 1882 | |||||||||
| 1883 | // If we haven't overrun the buffer yet, we can continue. | ||||||||
| 1884 | // Set the branch weights based on the simplifying assumption that this is | ||||||||
| 1885 | // like a while-loop, i.e., ignoring that the false branch fetches more | ||||||||
| 1886 | // elements and then returns to the loop. | ||||||||
| 1887 | Builder.CreateCondBr( | ||||||||
| 1888 | Builder.CreateICmpULT(indexPlusOne, count), LoopBodyBB, FetchMoreBB, | ||||||||
| 1889 | createProfileWeights(getProfileCount(S.getBody()), EntryCount)); | ||||||||
| 1890 | |||||||||
| 1891 | index->addIncoming(indexPlusOne, AfterBody.getBlock()); | ||||||||
| 1892 | count->addIncoming(count, AfterBody.getBlock()); | ||||||||
| 1893 | |||||||||
| 1894 | // Otherwise, we have to fetch more elements. | ||||||||
| 1895 | EmitBlock(FetchMoreBB); | ||||||||
| 1896 | |||||||||
| 1897 | CountRV = | ||||||||
| 1898 | CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), | ||||||||
| 1899 | getContext().getNSUIntegerType(), | ||||||||
| 1900 | FastEnumSel, Collection, Args); | ||||||||
| 1901 | |||||||||
| 1902 | // If we got a zero count, we're done. | ||||||||
| 1903 | llvm::Value *refetchCount = CountRV.getScalarVal(); | ||||||||
| 1904 | |||||||||
| 1905 | // (note that the message send might split FetchMoreBB) | ||||||||
| 1906 | index->addIncoming(zero, Builder.GetInsertBlock()); | ||||||||
| 1907 | count->addIncoming(refetchCount, Builder.GetInsertBlock()); | ||||||||
| 1908 | |||||||||
| 1909 | Builder.CreateCondBr(Builder.CreateICmpEQ(refetchCount, zero), | ||||||||
| 1910 | EmptyBB, LoopBodyBB); | ||||||||
| 1911 | |||||||||
| 1912 | // No more elements. | ||||||||
| 1913 | EmitBlock(EmptyBB); | ||||||||
| 1914 | |||||||||
| 1915 | if (!elementIsVariable) { | ||||||||
| 1916 | // If the element was not a declaration, set it to be null. | ||||||||
| 1917 | |||||||||
| 1918 | llvm::Value *null = llvm::Constant::getNullValue(convertedElementType); | ||||||||
| 1919 | elementLValue = EmitLValue(cast<Expr>(S.getElement())); | ||||||||
| 1920 | EmitStoreThroughLValue(RValue::get(null), elementLValue); | ||||||||
| 1921 | } | ||||||||
| 1922 | |||||||||
| 1923 | if (DI) | ||||||||
| 1924 | DI->EmitLexicalBlockEnd(Builder, S.getSourceRange().getEnd()); | ||||||||
| 1925 | |||||||||
| 1926 | ForScope.ForceCleanup(); | ||||||||
| 1927 | EmitBlock(LoopEnd.getBlock()); | ||||||||
| 1928 | } | ||||||||
| 1929 | |||||||||
| 1930 | void CodeGenFunction::EmitObjCAtTryStmt(const ObjCAtTryStmt &S) { | ||||||||
| 1931 | CGM.getObjCRuntime().EmitTryStmt(*this, S); | ||||||||
| 1932 | } | ||||||||
| 1933 | |||||||||
| 1934 | void CodeGenFunction::EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S) { | ||||||||
| 1935 | CGM.getObjCRuntime().EmitThrowStmt(*this, S); | ||||||||
| 1936 | } | ||||||||
| 1937 | |||||||||
| 1938 | void CodeGenFunction::EmitObjCAtSynchronizedStmt( | ||||||||
| 1939 | const ObjCAtSynchronizedStmt &S) { | ||||||||
| 1940 | CGM.getObjCRuntime().EmitSynchronizedStmt(*this, S); | ||||||||
| 1941 | } | ||||||||
| 1942 | |||||||||
| 1943 | namespace { | ||||||||
| 1944 | struct CallObjCRelease final : EHScopeStack::Cleanup { | ||||||||
| 1945 | CallObjCRelease(llvm::Value *object) : object(object) {} | ||||||||
| 1946 | llvm::Value *object; | ||||||||
| 1947 | |||||||||
| 1948 | void Emit(CodeGenFunction &CGF, Flags flags) override { | ||||||||
| 1949 | // Releases at the end of the full-expression are imprecise. | ||||||||
| 1950 | CGF.EmitARCRelease(object, ARCImpreciseLifetime); | ||||||||
| 1951 | } | ||||||||
| 1952 | }; | ||||||||
| 1953 | } | ||||||||
| 1954 | |||||||||
| 1955 | /// Produce the code for a CK_ARCConsumeObject. Does a primitive | ||||||||
| 1956 | /// release at the end of the full-expression. | ||||||||
| 1957 | llvm::Value *CodeGenFunction::EmitObjCConsumeObject(QualType type, | ||||||||
| 1958 | llvm::Value *object) { | ||||||||
| 1959 | // If we're in a conditional branch, we need to make the cleanup | ||||||||
| 1960 | // conditional. | ||||||||
| 1961 | pushFullExprCleanup<CallObjCRelease>(getARCCleanupKind(), object); | ||||||||
| 1962 | return object; | ||||||||
| 1963 | } | ||||||||
| 1964 | |||||||||
| 1965 | llvm::Value *CodeGenFunction::EmitObjCExtendObjectLifetime(QualType type, | ||||||||
| 1966 | llvm::Value *value) { | ||||||||
| 1967 | return EmitARCRetainAutorelease(type, value); | ||||||||
| 1968 | } | ||||||||
| 1969 | |||||||||
| 1970 | /// Given a number of pointers, inform the optimizer that they're | ||||||||
| 1971 | /// being intrinsically used up until this point in the program. | ||||||||
| 1972 | void CodeGenFunction::EmitARCIntrinsicUse(ArrayRef<llvm::Value*> values) { | ||||||||
| 1973 | llvm::Function *&fn = CGM.getObjCEntrypoints().clang_arc_use; | ||||||||
| 1974 | if (!fn) | ||||||||
| 1975 | fn = CGM.getIntrinsic(llvm::Intrinsic::objc_clang_arc_use); | ||||||||
| 1976 | |||||||||
| 1977 | // This isn't really a "runtime" function, but as an intrinsic it | ||||||||
| 1978 | // doesn't really matter as long as we align things up. | ||||||||
| 1979 | EmitNounwindRuntimeCall(fn, values); | ||||||||
| 1980 | } | ||||||||
| 1981 | |||||||||
| 1982 | static void setARCRuntimeFunctionLinkage(CodeGenModule &CGM, llvm::Value *RTF) { | ||||||||
| 1983 | if (auto *F = dyn_cast<llvm::Function>(RTF)) { | ||||||||
| 1984 | // If the target runtime doesn't naturally support ARC, emit weak | ||||||||
| 1985 | // references to the runtime support library. We don't really | ||||||||
| 1986 | // permit this to fail, but we need a particular relocation style. | ||||||||
| 1987 | if (!CGM.getLangOpts().ObjCRuntime.hasNativeARC() && | ||||||||
| 1988 | !CGM.getTriple().isOSBinFormatCOFF()) { | ||||||||
| 1989 | F->setLinkage(llvm::Function::ExternalWeakLinkage); | ||||||||
| 1990 | } | ||||||||
| 1991 | } | ||||||||
| 1992 | } | ||||||||
| 1993 | |||||||||
| 1994 | static void setARCRuntimeFunctionLinkage(CodeGenModule &CGM, | ||||||||
| 1995 | llvm::FunctionCallee RTF) { | ||||||||
| 1996 | setARCRuntimeFunctionLinkage(CGM, RTF.getCallee()); | ||||||||
| 1997 | } | ||||||||
| 1998 | |||||||||
| 1999 | /// Perform an operation having the signature | ||||||||
| 2000 | /// i8* (i8*) | ||||||||
| 2001 | /// where a null input causes a no-op and returns null. | ||||||||
| 2002 | static llvm::Value *emitARCValueOperation( | ||||||||
| 2003 | CodeGenFunction &CGF, llvm::Value *value, llvm::Type *returnType, | ||||||||
| 2004 | llvm::Function *&fn, llvm::Intrinsic::ID IntID, | ||||||||
| 2005 | llvm::CallInst::TailCallKind tailKind = llvm::CallInst::TCK_None) { | ||||||||
| 2006 | if (isa<llvm::ConstantPointerNull>(value)) | ||||||||
| 2007 | return value; | ||||||||
| 2008 | |||||||||
| 2009 | if (!fn) { | ||||||||
| 2010 | fn = CGF.CGM.getIntrinsic(IntID); | ||||||||
| 2011 | setARCRuntimeFunctionLinkage(CGF.CGM, fn); | ||||||||
| 2012 | } | ||||||||
| 2013 | |||||||||
| 2014 | // Cast the argument to 'id'. | ||||||||
| 2015 | llvm::Type *origType = returnType ? returnType : value->getType(); | ||||||||
| 2016 | value = CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy); | ||||||||
| 2017 | |||||||||
| 2018 | // Call the function. | ||||||||
| 2019 | llvm::CallInst *call = CGF.EmitNounwindRuntimeCall(fn, value); | ||||||||
| 2020 | call->setTailCallKind(tailKind); | ||||||||
| 2021 | |||||||||
| 2022 | // Cast the result back to the original type. | ||||||||
| 2023 | return CGF.Builder.CreateBitCast(call, origType); | ||||||||
| 2024 | } | ||||||||
| 2025 | |||||||||
| 2026 | /// Perform an operation having the following signature: | ||||||||
| 2027 | /// i8* (i8**) | ||||||||
| 2028 | static llvm::Value *emitARCLoadOperation(CodeGenFunction &CGF, Address addr, | ||||||||
| 2029 | llvm::Function *&fn, | ||||||||
| 2030 | llvm::Intrinsic::ID IntID) { | ||||||||
| 2031 | if (!fn) { | ||||||||
| 2032 | fn = CGF.CGM.getIntrinsic(IntID); | ||||||||
| 2033 | setARCRuntimeFunctionLinkage(CGF.CGM, fn); | ||||||||
| 2034 | } | ||||||||
| 2035 | |||||||||
| 2036 | // Cast the argument to 'id*'. | ||||||||
| 2037 | llvm::Type *origType = addr.getElementType(); | ||||||||
| 2038 | addr = CGF.Builder.CreateBitCast(addr, CGF.Int8PtrPtrTy); | ||||||||
| 2039 | |||||||||
| 2040 | // Call the function. | ||||||||
| 2041 | llvm::Value *result = CGF.EmitNounwindRuntimeCall(fn, addr.getPointer()); | ||||||||
| 2042 | |||||||||
| 2043 | // Cast the result back to a dereference of the original type. | ||||||||
| 2044 | if (origType != CGF.Int8PtrTy) | ||||||||
| 2045 | result = CGF.Builder.CreateBitCast(result, origType); | ||||||||
| 2046 | |||||||||
| 2047 | return result; | ||||||||
| 2048 | } | ||||||||
| 2049 | |||||||||
| 2050 | /// Perform an operation having the following signature: | ||||||||
| 2051 | /// i8* (i8**, i8*) | ||||||||
| 2052 | static llvm::Value *emitARCStoreOperation(CodeGenFunction &CGF, Address addr, | ||||||||
| 2053 | llvm::Value *value, | ||||||||
| 2054 | llvm::Function *&fn, | ||||||||
| 2055 | llvm::Intrinsic::ID IntID, | ||||||||
| 2056 | bool ignored) { | ||||||||
| 2057 | assert(addr.getElementType() == value->getType())((addr.getElementType() == value->getType()) ? static_cast <void> (0) : __assert_fail ("addr.getElementType() == value->getType()" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2057, __PRETTY_FUNCTION__)); | ||||||||
| 2058 | |||||||||
| 2059 | if (!fn) { | ||||||||
| 2060 | fn = CGF.CGM.getIntrinsic(IntID); | ||||||||
| 2061 | setARCRuntimeFunctionLinkage(CGF.CGM, fn); | ||||||||
| 2062 | } | ||||||||
| 2063 | |||||||||
| 2064 | llvm::Type *origType = value->getType(); | ||||||||
| 2065 | |||||||||
| 2066 | llvm::Value *args[] = { | ||||||||
| 2067 | CGF.Builder.CreateBitCast(addr.getPointer(), CGF.Int8PtrPtrTy), | ||||||||
| 2068 | CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy) | ||||||||
| 2069 | }; | ||||||||
| 2070 | llvm::CallInst *result = CGF.EmitNounwindRuntimeCall(fn, args); | ||||||||
| 2071 | |||||||||
| 2072 | if (ignored) return nullptr; | ||||||||
| 2073 | |||||||||
| 2074 | return CGF.Builder.CreateBitCast(result, origType); | ||||||||
| 2075 | } | ||||||||
| 2076 | |||||||||
| 2077 | /// Perform an operation having the following signature: | ||||||||
| 2078 | /// void (i8**, i8**) | ||||||||
| 2079 | static void emitARCCopyOperation(CodeGenFunction &CGF, Address dst, Address src, | ||||||||
| 2080 | llvm::Function *&fn, | ||||||||
| 2081 | llvm::Intrinsic::ID IntID) { | ||||||||
| 2082 | assert(dst.getType() == src.getType())((dst.getType() == src.getType()) ? static_cast<void> ( 0) : __assert_fail ("dst.getType() == src.getType()", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2082, __PRETTY_FUNCTION__)); | ||||||||
| 2083 | |||||||||
| 2084 | if (!fn) { | ||||||||
| 2085 | fn = CGF.CGM.getIntrinsic(IntID); | ||||||||
| 2086 | setARCRuntimeFunctionLinkage(CGF.CGM, fn); | ||||||||
| 2087 | } | ||||||||
| 2088 | |||||||||
| 2089 | llvm::Value *args[] = { | ||||||||
| 2090 | CGF.Builder.CreateBitCast(dst.getPointer(), CGF.Int8PtrPtrTy), | ||||||||
| 2091 | CGF.Builder.CreateBitCast(src.getPointer(), CGF.Int8PtrPtrTy) | ||||||||
| 2092 | }; | ||||||||
| 2093 | CGF.EmitNounwindRuntimeCall(fn, args); | ||||||||
| 2094 | } | ||||||||
| 2095 | |||||||||
| 2096 | /// Perform an operation having the signature | ||||||||
| 2097 | /// i8* (i8*) | ||||||||
| 2098 | /// where a null input causes a no-op and returns null. | ||||||||
| 2099 | static llvm::Value *emitObjCValueOperation(CodeGenFunction &CGF, | ||||||||
| 2100 | llvm::Value *value, | ||||||||
| 2101 | llvm::Type *returnType, | ||||||||
| 2102 | llvm::FunctionCallee &fn, | ||||||||
| 2103 | StringRef fnName) { | ||||||||
| 2104 | if (isa<llvm::ConstantPointerNull>(value)) | ||||||||
| 2105 | return value; | ||||||||
| 2106 | |||||||||
| 2107 | if (!fn) { | ||||||||
| 2108 | llvm::FunctionType *fnType = | ||||||||
| 2109 | llvm::FunctionType::get(CGF.Int8PtrTy, CGF.Int8PtrTy, false); | ||||||||
| 2110 | fn = CGF.CGM.CreateRuntimeFunction(fnType, fnName); | ||||||||
| 2111 | |||||||||
| 2112 | // We have Native ARC, so set nonlazybind attribute for performance | ||||||||
| 2113 | if (llvm::Function *f = dyn_cast<llvm::Function>(fn.getCallee())) | ||||||||
| 2114 | if (fnName == "objc_retain") | ||||||||
| 2115 | f->addFnAttr(llvm::Attribute::NonLazyBind); | ||||||||
| 2116 | } | ||||||||
| 2117 | |||||||||
| 2118 | // Cast the argument to 'id'. | ||||||||
| 2119 | llvm::Type *origType = returnType ? returnType : value->getType(); | ||||||||
| 2120 | value = CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy); | ||||||||
| 2121 | |||||||||
| 2122 | // Call the function. | ||||||||
| 2123 | llvm::CallBase *Inst = CGF.EmitCallOrInvoke(fn, value); | ||||||||
| 2124 | |||||||||
| 2125 | // Cast the result back to the original type. | ||||||||
| 2126 | return CGF.Builder.CreateBitCast(Inst, origType); | ||||||||
| 2127 | } | ||||||||
| 2128 | |||||||||
| 2129 | /// Produce the code to do a retain. Based on the type, calls one of: | ||||||||
| 2130 | /// call i8* \@objc_retain(i8* %value) | ||||||||
| 2131 | /// call i8* \@objc_retainBlock(i8* %value) | ||||||||
| 2132 | llvm::Value *CodeGenFunction::EmitARCRetain(QualType type, llvm::Value *value) { | ||||||||
| 2133 | if (type->isBlockPointerType()) | ||||||||
| 2134 | return EmitARCRetainBlock(value, /*mandatory*/ false); | ||||||||
| 2135 | else | ||||||||
| 2136 | return EmitARCRetainNonBlock(value); | ||||||||
| 2137 | } | ||||||||
| 2138 | |||||||||
| 2139 | /// Retain the given object, with normal retain semantics. | ||||||||
| 2140 | /// call i8* \@objc_retain(i8* %value) | ||||||||
| 2141 | llvm::Value *CodeGenFunction::EmitARCRetainNonBlock(llvm::Value *value) { | ||||||||
| 2142 | return emitARCValueOperation(*this, value, nullptr, | ||||||||
| 2143 | CGM.getObjCEntrypoints().objc_retain, | ||||||||
| 2144 | llvm::Intrinsic::objc_retain); | ||||||||
| 2145 | } | ||||||||
| 2146 | |||||||||
| 2147 | /// Retain the given block, with _Block_copy semantics. | ||||||||
| 2148 | /// call i8* \@objc_retainBlock(i8* %value) | ||||||||
| 2149 | /// | ||||||||
| 2150 | /// \param mandatory - If false, emit the call with metadata | ||||||||
| 2151 | /// indicating that it's okay for the optimizer to eliminate this call | ||||||||
| 2152 | /// if it can prove that the block never escapes except down the stack. | ||||||||
| 2153 | llvm::Value *CodeGenFunction::EmitARCRetainBlock(llvm::Value *value, | ||||||||
| 2154 | bool mandatory) { | ||||||||
| 2155 | llvm::Value *result | ||||||||
| 2156 | = emitARCValueOperation(*this, value, nullptr, | ||||||||
| 2157 | CGM.getObjCEntrypoints().objc_retainBlock, | ||||||||
| 2158 | llvm::Intrinsic::objc_retainBlock); | ||||||||
| 2159 | |||||||||
| 2160 | // If the copy isn't mandatory, add !clang.arc.copy_on_escape to | ||||||||
| 2161 | // tell the optimizer that it doesn't need to do this copy if the | ||||||||
| 2162 | // block doesn't escape, where being passed as an argument doesn't | ||||||||
| 2163 | // count as escaping. | ||||||||
| 2164 | if (!mandatory && isa<llvm::Instruction>(result)) { | ||||||||
| 2165 | llvm::CallInst *call | ||||||||
| 2166 | = cast<llvm::CallInst>(result->stripPointerCasts()); | ||||||||
| 2167 | assert(call->getCalledValue() == CGM.getObjCEntrypoints().objc_retainBlock)((call->getCalledValue() == CGM.getObjCEntrypoints().objc_retainBlock ) ? static_cast<void> (0) : __assert_fail ("call->getCalledValue() == CGM.getObjCEntrypoints().objc_retainBlock" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2167, __PRETTY_FUNCTION__)); | ||||||||
| 2168 | |||||||||
| 2169 | call->setMetadata("clang.arc.copy_on_escape", | ||||||||
| 2170 | llvm::MDNode::get(Builder.getContext(), None)); | ||||||||
| 2171 | } | ||||||||
| 2172 | |||||||||
| 2173 | return result; | ||||||||
| 2174 | } | ||||||||
| 2175 | |||||||||
| 2176 | static void emitAutoreleasedReturnValueMarker(CodeGenFunction &CGF) { | ||||||||
| 2177 | // Fetch the void(void) inline asm which marks that we're going to | ||||||||
| 2178 | // do something with the autoreleased return value. | ||||||||
| 2179 | llvm::InlineAsm *&marker | ||||||||
| 2180 | = CGF.CGM.getObjCEntrypoints().retainAutoreleasedReturnValueMarker; | ||||||||
| 2181 | if (!marker) { | ||||||||
| 2182 | StringRef assembly | ||||||||
| 2183 | = CGF.CGM.getTargetCodeGenInfo() | ||||||||
| 2184 | .getARCRetainAutoreleasedReturnValueMarker(); | ||||||||
| 2185 | |||||||||
| 2186 | // If we have an empty assembly string, there's nothing to do. | ||||||||
| 2187 | if (assembly.empty()) { | ||||||||
| 2188 | |||||||||
| 2189 | // Otherwise, at -O0, build an inline asm that we're going to call | ||||||||
| 2190 | // in a moment. | ||||||||
| 2191 | } else if (CGF.CGM.getCodeGenOpts().OptimizationLevel == 0) { | ||||||||
| 2192 | llvm::FunctionType *type = | ||||||||
| 2193 | llvm::FunctionType::get(CGF.VoidTy, /*variadic*/false); | ||||||||
| 2194 | |||||||||
| 2195 | marker = llvm::InlineAsm::get(type, assembly, "", /*sideeffects*/ true); | ||||||||
| 2196 | |||||||||
| 2197 | // If we're at -O1 and above, we don't want to litter the code | ||||||||
| 2198 | // with this marker yet, so leave a breadcrumb for the ARC | ||||||||
| 2199 | // optimizer to pick up. | ||||||||
| 2200 | } else { | ||||||||
| 2201 | const char *markerKey = "clang.arc.retainAutoreleasedReturnValueMarker"; | ||||||||
| 2202 | if (!CGF.CGM.getModule().getModuleFlag(markerKey)) { | ||||||||
| 2203 | auto *str = llvm::MDString::get(CGF.getLLVMContext(), assembly); | ||||||||
| 2204 | CGF.CGM.getModule().addModuleFlag(llvm::Module::Error, markerKey, str); | ||||||||
| 2205 | } | ||||||||
| 2206 | } | ||||||||
| 2207 | } | ||||||||
| 2208 | |||||||||
| 2209 | // Call the marker asm if we made one, which we do only at -O0. | ||||||||
| 2210 | if (marker) | ||||||||
| 2211 | CGF.Builder.CreateCall(marker, None, CGF.getBundlesForFunclet(marker)); | ||||||||
| 2212 | } | ||||||||
| 2213 | |||||||||
| 2214 | /// Retain the given object which is the result of a function call. | ||||||||
| 2215 | /// call i8* \@objc_retainAutoreleasedReturnValue(i8* %value) | ||||||||
| 2216 | /// | ||||||||
| 2217 | /// Yes, this function name is one character away from a different | ||||||||
| 2218 | /// call with completely different semantics. | ||||||||
| 2219 | llvm::Value * | ||||||||
| 2220 | CodeGenFunction::EmitARCRetainAutoreleasedReturnValue(llvm::Value *value) { | ||||||||
| 2221 | emitAutoreleasedReturnValueMarker(*this); | ||||||||
| 2222 | llvm::CallInst::TailCallKind tailKind = | ||||||||
| 2223 | CGM.getTargetCodeGenInfo() | ||||||||
| 2224 | .shouldSuppressTailCallsOfRetainAutoreleasedReturnValue() | ||||||||
| 2225 | ? llvm::CallInst::TCK_NoTail | ||||||||
| 2226 | : llvm::CallInst::TCK_None; | ||||||||
| 2227 | return emitARCValueOperation( | ||||||||
| 2228 | *this, value, nullptr, | ||||||||
| 2229 | CGM.getObjCEntrypoints().objc_retainAutoreleasedReturnValue, | ||||||||
| 2230 | llvm::Intrinsic::objc_retainAutoreleasedReturnValue, tailKind); | ||||||||
| 2231 | } | ||||||||
| 2232 | |||||||||
| 2233 | /// Claim a possibly-autoreleased return value at +0. This is only | ||||||||
| 2234 | /// valid to do in contexts which do not rely on the retain to keep | ||||||||
| 2235 | /// the object valid for all of its uses; for example, when | ||||||||
| 2236 | /// the value is ignored, or when it is being assigned to an | ||||||||
| 2237 | /// __unsafe_unretained variable. | ||||||||
| 2238 | /// | ||||||||
| 2239 | /// call i8* \@objc_unsafeClaimAutoreleasedReturnValue(i8* %value) | ||||||||
| 2240 | llvm::Value * | ||||||||
| 2241 | CodeGenFunction::EmitARCUnsafeClaimAutoreleasedReturnValue(llvm::Value *value) { | ||||||||
| 2242 | emitAutoreleasedReturnValueMarker(*this); | ||||||||
| 2243 | return emitARCValueOperation(*this, value, nullptr, | ||||||||
| 2244 | CGM.getObjCEntrypoints().objc_unsafeClaimAutoreleasedReturnValue, | ||||||||
| 2245 | llvm::Intrinsic::objc_unsafeClaimAutoreleasedReturnValue); | ||||||||
| 2246 | } | ||||||||
| 2247 | |||||||||
| 2248 | /// Release the given object. | ||||||||
| 2249 | /// call void \@objc_release(i8* %value) | ||||||||
| 2250 | void CodeGenFunction::EmitARCRelease(llvm::Value *value, | ||||||||
| 2251 | ARCPreciseLifetime_t precise) { | ||||||||
| 2252 | if (isa<llvm::ConstantPointerNull>(value)) return; | ||||||||
| 2253 | |||||||||
| 2254 | llvm::Function *&fn = CGM.getObjCEntrypoints().objc_release; | ||||||||
| 2255 | if (!fn) { | ||||||||
| 2256 | fn = CGM.getIntrinsic(llvm::Intrinsic::objc_release); | ||||||||
| 2257 | setARCRuntimeFunctionLinkage(CGM, fn); | ||||||||
| 2258 | } | ||||||||
| 2259 | |||||||||
| 2260 | // Cast the argument to 'id'. | ||||||||
| 2261 | value = Builder.CreateBitCast(value, Int8PtrTy); | ||||||||
| 2262 | |||||||||
| 2263 | // Call objc_release. | ||||||||
| 2264 | llvm::CallInst *call = EmitNounwindRuntimeCall(fn, value); | ||||||||
| 2265 | |||||||||
| 2266 | if (precise == ARCImpreciseLifetime) { | ||||||||
| 2267 | call->setMetadata("clang.imprecise_release", | ||||||||
| 2268 | llvm::MDNode::get(Builder.getContext(), None)); | ||||||||
| 2269 | } | ||||||||
| 2270 | } | ||||||||
| 2271 | |||||||||
| 2272 | /// Destroy a __strong variable. | ||||||||
| 2273 | /// | ||||||||
| 2274 | /// At -O0, emit a call to store 'null' into the address; | ||||||||
| 2275 | /// instrumenting tools prefer this because the address is exposed, | ||||||||
| 2276 | /// but it's relatively cumbersome to optimize. | ||||||||
| 2277 | /// | ||||||||
| 2278 | /// At -O1 and above, just load and call objc_release. | ||||||||
| 2279 | /// | ||||||||
| 2280 | /// call void \@objc_storeStrong(i8** %addr, i8* null) | ||||||||
| 2281 | void CodeGenFunction::EmitARCDestroyStrong(Address addr, | ||||||||
| 2282 | ARCPreciseLifetime_t precise) { | ||||||||
| 2283 | if (CGM.getCodeGenOpts().OptimizationLevel == 0) { | ||||||||
| 2284 | llvm::Value *null = getNullForVariable(addr); | ||||||||
| 2285 | EmitARCStoreStrongCall(addr, null, /*ignored*/ true); | ||||||||
| 2286 | return; | ||||||||
| 2287 | } | ||||||||
| 2288 | |||||||||
| 2289 | llvm::Value *value = Builder.CreateLoad(addr); | ||||||||
| 2290 | EmitARCRelease(value, precise); | ||||||||
| 2291 | } | ||||||||
| 2292 | |||||||||
| 2293 | /// Store into a strong object. Always calls this: | ||||||||
| 2294 | /// call void \@objc_storeStrong(i8** %addr, i8* %value) | ||||||||
| 2295 | llvm::Value *CodeGenFunction::EmitARCStoreStrongCall(Address addr, | ||||||||
| 2296 | llvm::Value *value, | ||||||||
| 2297 | bool ignored) { | ||||||||
| 2298 | assert(addr.getElementType() == value->getType())((addr.getElementType() == value->getType()) ? static_cast <void> (0) : __assert_fail ("addr.getElementType() == value->getType()" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2298, __PRETTY_FUNCTION__)); | ||||||||
| 2299 | |||||||||
| 2300 | llvm::Function *&fn = CGM.getObjCEntrypoints().objc_storeStrong; | ||||||||
| 2301 | if (!fn) { | ||||||||
| 2302 | fn = CGM.getIntrinsic(llvm::Intrinsic::objc_storeStrong); | ||||||||
| 2303 | setARCRuntimeFunctionLinkage(CGM, fn); | ||||||||
| 2304 | } | ||||||||
| 2305 | |||||||||
| 2306 | llvm::Value *args[] = { | ||||||||
| 2307 | Builder.CreateBitCast(addr.getPointer(), Int8PtrPtrTy), | ||||||||
| 2308 | Builder.CreateBitCast(value, Int8PtrTy) | ||||||||
| 2309 | }; | ||||||||
| 2310 | EmitNounwindRuntimeCall(fn, args); | ||||||||
| 2311 | |||||||||
| 2312 | if (ignored) return nullptr; | ||||||||
| 2313 | return value; | ||||||||
| 2314 | } | ||||||||
| 2315 | |||||||||
| 2316 | /// Store into a strong object. Sometimes calls this: | ||||||||
| 2317 | /// call void \@objc_storeStrong(i8** %addr, i8* %value) | ||||||||
| 2318 | /// Other times, breaks it down into components. | ||||||||
| 2319 | llvm::Value *CodeGenFunction::EmitARCStoreStrong(LValue dst, | ||||||||
| 2320 | llvm::Value *newValue, | ||||||||
| 2321 | bool ignored) { | ||||||||
| 2322 | QualType type = dst.getType(); | ||||||||
| 2323 | bool isBlock = type->isBlockPointerType(); | ||||||||
| 2324 | |||||||||
| 2325 | // Use a store barrier at -O0 unless this is a block type or the | ||||||||
| 2326 | // lvalue is inadequately aligned. | ||||||||
| 2327 | if (shouldUseFusedARCCalls() && | ||||||||
| 2328 | !isBlock && | ||||||||
| 2329 | (dst.getAlignment().isZero() || | ||||||||
| 2330 | dst.getAlignment() >= CharUnits::fromQuantity(PointerAlignInBytes))) { | ||||||||
| 2331 | return EmitARCStoreStrongCall(dst.getAddress(*this), newValue, ignored); | ||||||||
| 2332 | } | ||||||||
| 2333 | |||||||||
| 2334 | // Otherwise, split it out. | ||||||||
| 2335 | |||||||||
| 2336 | // Retain the new value. | ||||||||
| 2337 | newValue = EmitARCRetain(type, newValue); | ||||||||
| 2338 | |||||||||
| 2339 | // Read the old value. | ||||||||
| 2340 | llvm::Value *oldValue = EmitLoadOfScalar(dst, SourceLocation()); | ||||||||
| 2341 | |||||||||
| 2342 | // Store. We do this before the release so that any deallocs won't | ||||||||
| 2343 | // see the old value. | ||||||||
| 2344 | EmitStoreOfScalar(newValue, dst); | ||||||||
| 2345 | |||||||||
| 2346 | // Finally, release the old value. | ||||||||
| 2347 | EmitARCRelease(oldValue, dst.isARCPreciseLifetime()); | ||||||||
| 2348 | |||||||||
| 2349 | return newValue; | ||||||||
| 2350 | } | ||||||||
| 2351 | |||||||||
| 2352 | /// Autorelease the given object. | ||||||||
| 2353 | /// call i8* \@objc_autorelease(i8* %value) | ||||||||
| 2354 | llvm::Value *CodeGenFunction::EmitARCAutorelease(llvm::Value *value) { | ||||||||
| 2355 | return emitARCValueOperation(*this, value, nullptr, | ||||||||
| 2356 | CGM.getObjCEntrypoints().objc_autorelease, | ||||||||
| 2357 | llvm::Intrinsic::objc_autorelease); | ||||||||
| 2358 | } | ||||||||
| 2359 | |||||||||
| 2360 | /// Autorelease the given object. | ||||||||
| 2361 | /// call i8* \@objc_autoreleaseReturnValue(i8* %value) | ||||||||
| 2362 | llvm::Value * | ||||||||
| 2363 | CodeGenFunction::EmitARCAutoreleaseReturnValue(llvm::Value *value) { | ||||||||
| 2364 | return emitARCValueOperation(*this, value, nullptr, | ||||||||
| 2365 | CGM.getObjCEntrypoints().objc_autoreleaseReturnValue, | ||||||||
| 2366 | llvm::Intrinsic::objc_autoreleaseReturnValue, | ||||||||
| 2367 | llvm::CallInst::TCK_Tail); | ||||||||
| 2368 | } | ||||||||
| 2369 | |||||||||
| 2370 | /// Do a fused retain/autorelease of the given object. | ||||||||
| 2371 | /// call i8* \@objc_retainAutoreleaseReturnValue(i8* %value) | ||||||||
| 2372 | llvm::Value * | ||||||||
| 2373 | CodeGenFunction::EmitARCRetainAutoreleaseReturnValue(llvm::Value *value) { | ||||||||
| 2374 | return emitARCValueOperation(*this, value, nullptr, | ||||||||
| 2375 | CGM.getObjCEntrypoints().objc_retainAutoreleaseReturnValue, | ||||||||
| 2376 | llvm::Intrinsic::objc_retainAutoreleaseReturnValue, | ||||||||
| 2377 | llvm::CallInst::TCK_Tail); | ||||||||
| 2378 | } | ||||||||
| 2379 | |||||||||
| 2380 | /// Do a fused retain/autorelease of the given object. | ||||||||
| 2381 | /// call i8* \@objc_retainAutorelease(i8* %value) | ||||||||
| 2382 | /// or | ||||||||
| 2383 | /// %retain = call i8* \@objc_retainBlock(i8* %value) | ||||||||
| 2384 | /// call i8* \@objc_autorelease(i8* %retain) | ||||||||
| 2385 | llvm::Value *CodeGenFunction::EmitARCRetainAutorelease(QualType type, | ||||||||
| 2386 | llvm::Value *value) { | ||||||||
| 2387 | if (!type->isBlockPointerType()) | ||||||||
| 2388 | return EmitARCRetainAutoreleaseNonBlock(value); | ||||||||
| 2389 | |||||||||
| 2390 | if (isa<llvm::ConstantPointerNull>(value)) return value; | ||||||||
| 2391 | |||||||||
| 2392 | llvm::Type *origType = value->getType(); | ||||||||
| 2393 | value = Builder.CreateBitCast(value, Int8PtrTy); | ||||||||
| 2394 | value = EmitARCRetainBlock(value, /*mandatory*/ true); | ||||||||
| 2395 | value = EmitARCAutorelease(value); | ||||||||
| 2396 | return Builder.CreateBitCast(value, origType); | ||||||||
| 2397 | } | ||||||||
| 2398 | |||||||||
| 2399 | /// Do a fused retain/autorelease of the given object. | ||||||||
| 2400 | /// call i8* \@objc_retainAutorelease(i8* %value) | ||||||||
| 2401 | llvm::Value * | ||||||||
| 2402 | CodeGenFunction::EmitARCRetainAutoreleaseNonBlock(llvm::Value *value) { | ||||||||
| 2403 | return emitARCValueOperation(*this, value, nullptr, | ||||||||
| 2404 | CGM.getObjCEntrypoints().objc_retainAutorelease, | ||||||||
| 2405 | llvm::Intrinsic::objc_retainAutorelease); | ||||||||
| 2406 | } | ||||||||
| 2407 | |||||||||
| 2408 | /// i8* \@objc_loadWeak(i8** %addr) | ||||||||
| 2409 | /// Essentially objc_autorelease(objc_loadWeakRetained(addr)). | ||||||||
| 2410 | llvm::Value *CodeGenFunction::EmitARCLoadWeak(Address addr) { | ||||||||
| 2411 | return emitARCLoadOperation(*this, addr, | ||||||||
| 2412 | CGM.getObjCEntrypoints().objc_loadWeak, | ||||||||
| 2413 | llvm::Intrinsic::objc_loadWeak); | ||||||||
| 2414 | } | ||||||||
| 2415 | |||||||||
| 2416 | /// i8* \@objc_loadWeakRetained(i8** %addr) | ||||||||
| 2417 | llvm::Value *CodeGenFunction::EmitARCLoadWeakRetained(Address addr) { | ||||||||
| 2418 | return emitARCLoadOperation(*this, addr, | ||||||||
| 2419 | CGM.getObjCEntrypoints().objc_loadWeakRetained, | ||||||||
| 2420 | llvm::Intrinsic::objc_loadWeakRetained); | ||||||||
| 2421 | } | ||||||||
| 2422 | |||||||||
| 2423 | /// i8* \@objc_storeWeak(i8** %addr, i8* %value) | ||||||||
| 2424 | /// Returns %value. | ||||||||
| 2425 | llvm::Value *CodeGenFunction::EmitARCStoreWeak(Address addr, | ||||||||
| 2426 | llvm::Value *value, | ||||||||
| 2427 | bool ignored) { | ||||||||
| 2428 | return emitARCStoreOperation(*this, addr, value, | ||||||||
| 2429 | CGM.getObjCEntrypoints().objc_storeWeak, | ||||||||
| 2430 | llvm::Intrinsic::objc_storeWeak, ignored); | ||||||||
| 2431 | } | ||||||||
| 2432 | |||||||||
| 2433 | /// i8* \@objc_initWeak(i8** %addr, i8* %value) | ||||||||
| 2434 | /// Returns %value. %addr is known to not have a current weak entry. | ||||||||
| 2435 | /// Essentially equivalent to: | ||||||||
| 2436 | /// *addr = nil; objc_storeWeak(addr, value); | ||||||||
| 2437 | void CodeGenFunction::EmitARCInitWeak(Address addr, llvm::Value *value) { | ||||||||
| 2438 | // If we're initializing to null, just write null to memory; no need | ||||||||
| 2439 | // to get the runtime involved. But don't do this if optimization | ||||||||
| 2440 | // is enabled, because accounting for this would make the optimizer | ||||||||
| 2441 | // much more complicated. | ||||||||
| 2442 | if (isa<llvm::ConstantPointerNull>(value) && | ||||||||
| 2443 | CGM.getCodeGenOpts().OptimizationLevel == 0) { | ||||||||
| 2444 | Builder.CreateStore(value, addr); | ||||||||
| 2445 | return; | ||||||||
| 2446 | } | ||||||||
| 2447 | |||||||||
| 2448 | emitARCStoreOperation(*this, addr, value, | ||||||||
| 2449 | CGM.getObjCEntrypoints().objc_initWeak, | ||||||||
| 2450 | llvm::Intrinsic::objc_initWeak, /*ignored*/ true); | ||||||||
| 2451 | } | ||||||||
| 2452 | |||||||||
| 2453 | /// void \@objc_destroyWeak(i8** %addr) | ||||||||
| 2454 | /// Essentially objc_storeWeak(addr, nil). | ||||||||
| 2455 | void CodeGenFunction::EmitARCDestroyWeak(Address addr) { | ||||||||
| 2456 | llvm::Function *&fn = CGM.getObjCEntrypoints().objc_destroyWeak; | ||||||||
| 2457 | if (!fn) { | ||||||||
| 2458 | fn = CGM.getIntrinsic(llvm::Intrinsic::objc_destroyWeak); | ||||||||
| 2459 | setARCRuntimeFunctionLinkage(CGM, fn); | ||||||||
| 2460 | } | ||||||||
| 2461 | |||||||||
| 2462 | // Cast the argument to 'id*'. | ||||||||
| 2463 | addr = Builder.CreateBitCast(addr, Int8PtrPtrTy); | ||||||||
| 2464 | |||||||||
| 2465 | EmitNounwindRuntimeCall(fn, addr.getPointer()); | ||||||||
| 2466 | } | ||||||||
| 2467 | |||||||||
| 2468 | /// void \@objc_moveWeak(i8** %dest, i8** %src) | ||||||||
| 2469 | /// Disregards the current value in %dest. Leaves %src pointing to nothing. | ||||||||
| 2470 | /// Essentially (objc_copyWeak(dest, src), objc_destroyWeak(src)). | ||||||||
| 2471 | void CodeGenFunction::EmitARCMoveWeak(Address dst, Address src) { | ||||||||
| 2472 | emitARCCopyOperation(*this, dst, src, | ||||||||
| 2473 | CGM.getObjCEntrypoints().objc_moveWeak, | ||||||||
| 2474 | llvm::Intrinsic::objc_moveWeak); | ||||||||
| 2475 | } | ||||||||
| 2476 | |||||||||
| 2477 | /// void \@objc_copyWeak(i8** %dest, i8** %src) | ||||||||
| 2478 | /// Disregards the current value in %dest. Essentially | ||||||||
| 2479 | /// objc_release(objc_initWeak(dest, objc_readWeakRetained(src))) | ||||||||
| 2480 | void CodeGenFunction::EmitARCCopyWeak(Address dst, Address src) { | ||||||||
| 2481 | emitARCCopyOperation(*this, dst, src, | ||||||||
| 2482 | CGM.getObjCEntrypoints().objc_copyWeak, | ||||||||
| 2483 | llvm::Intrinsic::objc_copyWeak); | ||||||||
| 2484 | } | ||||||||
| 2485 | |||||||||
| 2486 | void CodeGenFunction::emitARCCopyAssignWeak(QualType Ty, Address DstAddr, | ||||||||
| 2487 | Address SrcAddr) { | ||||||||
| 2488 | llvm::Value *Object = EmitARCLoadWeakRetained(SrcAddr); | ||||||||
| 2489 | Object = EmitObjCConsumeObject(Ty, Object); | ||||||||
| 2490 | EmitARCStoreWeak(DstAddr, Object, false); | ||||||||
| 2491 | } | ||||||||
| 2492 | |||||||||
| 2493 | void CodeGenFunction::emitARCMoveAssignWeak(QualType Ty, Address DstAddr, | ||||||||
| 2494 | Address SrcAddr) { | ||||||||
| 2495 | llvm::Value *Object = EmitARCLoadWeakRetained(SrcAddr); | ||||||||
| 2496 | Object = EmitObjCConsumeObject(Ty, Object); | ||||||||
| 2497 | EmitARCStoreWeak(DstAddr, Object, false); | ||||||||
| 2498 | EmitARCDestroyWeak(SrcAddr); | ||||||||
| 2499 | } | ||||||||
| 2500 | |||||||||
| 2501 | /// Produce the code to do a objc_autoreleasepool_push. | ||||||||
| 2502 | /// call i8* \@objc_autoreleasePoolPush(void) | ||||||||
| 2503 | llvm::Value *CodeGenFunction::EmitObjCAutoreleasePoolPush() { | ||||||||
| 2504 | llvm::Function *&fn = CGM.getObjCEntrypoints().objc_autoreleasePoolPush; | ||||||||
| 2505 | if (!fn) { | ||||||||
| 2506 | fn = CGM.getIntrinsic(llvm::Intrinsic::objc_autoreleasePoolPush); | ||||||||
| 2507 | setARCRuntimeFunctionLinkage(CGM, fn); | ||||||||
| 2508 | } | ||||||||
| 2509 | |||||||||
| 2510 | return EmitNounwindRuntimeCall(fn); | ||||||||
| 2511 | } | ||||||||
| 2512 | |||||||||
| 2513 | /// Produce the code to do a primitive release. | ||||||||
| 2514 | /// call void \@objc_autoreleasePoolPop(i8* %ptr) | ||||||||
| 2515 | void CodeGenFunction::EmitObjCAutoreleasePoolPop(llvm::Value *value) { | ||||||||
| 2516 | assert(value->getType() == Int8PtrTy)((value->getType() == Int8PtrTy) ? static_cast<void> (0) : __assert_fail ("value->getType() == Int8PtrTy", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2516, __PRETTY_FUNCTION__)); | ||||||||
| 2517 | |||||||||
| 2518 | if (getInvokeDest()) { | ||||||||
| 2519 | // Call the runtime method not the intrinsic if we are handling exceptions | ||||||||
| 2520 | llvm::FunctionCallee &fn = | ||||||||
| 2521 | CGM.getObjCEntrypoints().objc_autoreleasePoolPopInvoke; | ||||||||
| 2522 | if (!fn) { | ||||||||
| 2523 | llvm::FunctionType *fnType = | ||||||||
| 2524 | llvm::FunctionType::get(Builder.getVoidTy(), Int8PtrTy, false); | ||||||||
| 2525 | fn = CGM.CreateRuntimeFunction(fnType, "objc_autoreleasePoolPop"); | ||||||||
| 2526 | setARCRuntimeFunctionLinkage(CGM, fn); | ||||||||
| 2527 | } | ||||||||
| 2528 | |||||||||
| 2529 | // objc_autoreleasePoolPop can throw. | ||||||||
| 2530 | EmitRuntimeCallOrInvoke(fn, value); | ||||||||
| 2531 | } else { | ||||||||
| 2532 | llvm::FunctionCallee &fn = CGM.getObjCEntrypoints().objc_autoreleasePoolPop; | ||||||||
| 2533 | if (!fn) { | ||||||||
| 2534 | fn = CGM.getIntrinsic(llvm::Intrinsic::objc_autoreleasePoolPop); | ||||||||
| 2535 | setARCRuntimeFunctionLinkage(CGM, fn); | ||||||||
| 2536 | } | ||||||||
| 2537 | |||||||||
| 2538 | EmitRuntimeCall(fn, value); | ||||||||
| 2539 | } | ||||||||
| 2540 | } | ||||||||
| 2541 | |||||||||
| 2542 | /// Produce the code to do an MRR version objc_autoreleasepool_push. | ||||||||
| 2543 | /// Which is: [[NSAutoreleasePool alloc] init]; | ||||||||
| 2544 | /// Where alloc is declared as: + (id) alloc; in NSAutoreleasePool class. | ||||||||
| 2545 | /// init is declared as: - (id) init; in its NSObject super class. | ||||||||
| 2546 | /// | ||||||||
| 2547 | llvm::Value *CodeGenFunction::EmitObjCMRRAutoreleasePoolPush() { | ||||||||
| 2548 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); | ||||||||
| 2549 | llvm::Value *Receiver = Runtime.EmitNSAutoreleasePoolClassRef(*this); | ||||||||
| 2550 | // [NSAutoreleasePool alloc] | ||||||||
| 2551 | IdentifierInfo *II = &CGM.getContext().Idents.get("alloc"); | ||||||||
| 2552 | Selector AllocSel = getContext().Selectors.getSelector(0, &II); | ||||||||
| 2553 | CallArgList Args; | ||||||||
| 2554 | RValue AllocRV = | ||||||||
| 2555 | Runtime.GenerateMessageSend(*this, ReturnValueSlot(), | ||||||||
| 2556 | getContext().getObjCIdType(), | ||||||||
| 2557 | AllocSel, Receiver, Args); | ||||||||
| 2558 | |||||||||
| 2559 | // [Receiver init] | ||||||||
| 2560 | Receiver = AllocRV.getScalarVal(); | ||||||||
| 2561 | II = &CGM.getContext().Idents.get("init"); | ||||||||
| 2562 | Selector InitSel = getContext().Selectors.getSelector(0, &II); | ||||||||
| 2563 | RValue InitRV = | ||||||||
| 2564 | Runtime.GenerateMessageSend(*this, ReturnValueSlot(), | ||||||||
| 2565 | getContext().getObjCIdType(), | ||||||||
| 2566 | InitSel, Receiver, Args); | ||||||||
| 2567 | return InitRV.getScalarVal(); | ||||||||
| 2568 | } | ||||||||
| 2569 | |||||||||
| 2570 | /// Allocate the given objc object. | ||||||||
| 2571 | /// call i8* \@objc_alloc(i8* %value) | ||||||||
| 2572 | llvm::Value *CodeGenFunction::EmitObjCAlloc(llvm::Value *value, | ||||||||
| 2573 | llvm::Type *resultType) { | ||||||||
| 2574 | return emitObjCValueOperation(*this, value, resultType, | ||||||||
| 2575 | CGM.getObjCEntrypoints().objc_alloc, | ||||||||
| 2576 | "objc_alloc"); | ||||||||
| 2577 | } | ||||||||
| 2578 | |||||||||
| 2579 | /// Allocate the given objc object. | ||||||||
| 2580 | /// call i8* \@objc_allocWithZone(i8* %value) | ||||||||
| 2581 | llvm::Value *CodeGenFunction::EmitObjCAllocWithZone(llvm::Value *value, | ||||||||
| 2582 | llvm::Type *resultType) { | ||||||||
| 2583 | return emitObjCValueOperation(*this, value, resultType, | ||||||||
| 2584 | CGM.getObjCEntrypoints().objc_allocWithZone, | ||||||||
| 2585 | "objc_allocWithZone"); | ||||||||
| 2586 | } | ||||||||
| 2587 | |||||||||
| 2588 | llvm::Value *CodeGenFunction::EmitObjCAllocInit(llvm::Value *value, | ||||||||
| 2589 | llvm::Type *resultType) { | ||||||||
| 2590 | return emitObjCValueOperation(*this, value, resultType, | ||||||||
| 2591 | CGM.getObjCEntrypoints().objc_alloc_init, | ||||||||
| 2592 | "objc_alloc_init"); | ||||||||
| 2593 | } | ||||||||
| 2594 | |||||||||
| 2595 | /// Produce the code to do a primitive release. | ||||||||
| 2596 | /// [tmp drain]; | ||||||||
| 2597 | void CodeGenFunction::EmitObjCMRRAutoreleasePoolPop(llvm::Value *Arg) { | ||||||||
| 2598 | IdentifierInfo *II = &CGM.getContext().Idents.get("drain"); | ||||||||
| 2599 | Selector DrainSel = getContext().Selectors.getSelector(0, &II); | ||||||||
| 2600 | CallArgList Args; | ||||||||
| 2601 | CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), | ||||||||
| 2602 | getContext().VoidTy, DrainSel, Arg, Args); | ||||||||
| 2603 | } | ||||||||
| 2604 | |||||||||
| 2605 | void CodeGenFunction::destroyARCStrongPrecise(CodeGenFunction &CGF, | ||||||||
| 2606 | Address addr, | ||||||||
| 2607 | QualType type) { | ||||||||
| 2608 | CGF.EmitARCDestroyStrong(addr, ARCPreciseLifetime); | ||||||||
| 2609 | } | ||||||||
| 2610 | |||||||||
| 2611 | void CodeGenFunction::destroyARCStrongImprecise(CodeGenFunction &CGF, | ||||||||
| 2612 | Address addr, | ||||||||
| 2613 | QualType type) { | ||||||||
| 2614 | CGF.EmitARCDestroyStrong(addr, ARCImpreciseLifetime); | ||||||||
| 2615 | } | ||||||||
| 2616 | |||||||||
| 2617 | void CodeGenFunction::destroyARCWeak(CodeGenFunction &CGF, | ||||||||
| 2618 | Address addr, | ||||||||
| 2619 | QualType type) { | ||||||||
| 2620 | CGF.EmitARCDestroyWeak(addr); | ||||||||
| 2621 | } | ||||||||
| 2622 | |||||||||
| 2623 | void CodeGenFunction::emitARCIntrinsicUse(CodeGenFunction &CGF, Address addr, | ||||||||
| 2624 | QualType type) { | ||||||||
| 2625 | llvm::Value *value = CGF.Builder.CreateLoad(addr); | ||||||||
| 2626 | CGF.EmitARCIntrinsicUse(value); | ||||||||
| 2627 | } | ||||||||
| 2628 | |||||||||
| 2629 | /// Autorelease the given object. | ||||||||
| 2630 | /// call i8* \@objc_autorelease(i8* %value) | ||||||||
| 2631 | llvm::Value *CodeGenFunction::EmitObjCAutorelease(llvm::Value *value, | ||||||||
| 2632 | llvm::Type *returnType) { | ||||||||
| 2633 | return emitObjCValueOperation( | ||||||||
| 2634 | *this, value, returnType, | ||||||||
| 2635 | CGM.getObjCEntrypoints().objc_autoreleaseRuntimeFunction, | ||||||||
| 2636 | "objc_autorelease"); | ||||||||
| 2637 | } | ||||||||
| 2638 | |||||||||
| 2639 | /// Retain the given object, with normal retain semantics. | ||||||||
| 2640 | /// call i8* \@objc_retain(i8* %value) | ||||||||
| 2641 | llvm::Value *CodeGenFunction::EmitObjCRetainNonBlock(llvm::Value *value, | ||||||||
| 2642 | llvm::Type *returnType) { | ||||||||
| 2643 | return emitObjCValueOperation( | ||||||||
| 2644 | *this, value, returnType, | ||||||||
| 2645 | CGM.getObjCEntrypoints().objc_retainRuntimeFunction, "objc_retain"); | ||||||||
| 2646 | } | ||||||||
| 2647 | |||||||||
| 2648 | /// Release the given object. | ||||||||
| 2649 | /// call void \@objc_release(i8* %value) | ||||||||
| 2650 | void CodeGenFunction::EmitObjCRelease(llvm::Value *value, | ||||||||
| 2651 | ARCPreciseLifetime_t precise) { | ||||||||
| 2652 | if (isa<llvm::ConstantPointerNull>(value)) return; | ||||||||
| 2653 | |||||||||
| 2654 | llvm::FunctionCallee &fn = | ||||||||
| 2655 | CGM.getObjCEntrypoints().objc_releaseRuntimeFunction; | ||||||||
| 2656 | if (!fn) { | ||||||||
| 2657 | llvm::FunctionType *fnType = | ||||||||
| 2658 | llvm::FunctionType::get(Builder.getVoidTy(), Int8PtrTy, false); | ||||||||
| 2659 | fn = CGM.CreateRuntimeFunction(fnType, "objc_release"); | ||||||||
| 2660 | setARCRuntimeFunctionLinkage(CGM, fn); | ||||||||
| 2661 | // We have Native ARC, so set nonlazybind attribute for performance | ||||||||
| 2662 | if (llvm::Function *f = dyn_cast<llvm::Function>(fn.getCallee())) | ||||||||
| 2663 | f->addFnAttr(llvm::Attribute::NonLazyBind); | ||||||||
| 2664 | } | ||||||||
| 2665 | |||||||||
| 2666 | // Cast the argument to 'id'. | ||||||||
| 2667 | value = Builder.CreateBitCast(value, Int8PtrTy); | ||||||||
| 2668 | |||||||||
| 2669 | // Call objc_release. | ||||||||
| 2670 | llvm::CallBase *call = EmitCallOrInvoke(fn, value); | ||||||||
| 2671 | |||||||||
| 2672 | if (precise == ARCImpreciseLifetime) { | ||||||||
| 2673 | call->setMetadata("clang.imprecise_release", | ||||||||
| 2674 | llvm::MDNode::get(Builder.getContext(), None)); | ||||||||
| 2675 | } | ||||||||
| 2676 | } | ||||||||
| 2677 | |||||||||
| 2678 | namespace { | ||||||||
| 2679 | struct CallObjCAutoreleasePoolObject final : EHScopeStack::Cleanup { | ||||||||
| 2680 | llvm::Value *Token; | ||||||||
| 2681 | |||||||||
| 2682 | CallObjCAutoreleasePoolObject(llvm::Value *token) : Token(token) {} | ||||||||
| 2683 | |||||||||
| 2684 | void Emit(CodeGenFunction &CGF, Flags flags) override { | ||||||||
| 2685 | CGF.EmitObjCAutoreleasePoolPop(Token); | ||||||||
| 2686 | } | ||||||||
| 2687 | }; | ||||||||
| 2688 | struct CallObjCMRRAutoreleasePoolObject final : EHScopeStack::Cleanup { | ||||||||
| 2689 | llvm::Value *Token; | ||||||||
| 2690 | |||||||||
| 2691 | CallObjCMRRAutoreleasePoolObject(llvm::Value *token) : Token(token) {} | ||||||||
| 2692 | |||||||||
| 2693 | void Emit(CodeGenFunction &CGF, Flags flags) override { | ||||||||
| 2694 | CGF.EmitObjCMRRAutoreleasePoolPop(Token); | ||||||||
| 2695 | } | ||||||||
| 2696 | }; | ||||||||
| 2697 | } | ||||||||
| 2698 | |||||||||
| 2699 | void CodeGenFunction::EmitObjCAutoreleasePoolCleanup(llvm::Value *Ptr) { | ||||||||
| 2700 | if (CGM.getLangOpts().ObjCAutoRefCount) | ||||||||
| 2701 | EHStack.pushCleanup<CallObjCAutoreleasePoolObject>(NormalCleanup, Ptr); | ||||||||
| 2702 | else | ||||||||
| 2703 | EHStack.pushCleanup<CallObjCMRRAutoreleasePoolObject>(NormalCleanup, Ptr); | ||||||||
| 2704 | } | ||||||||
| 2705 | |||||||||
| 2706 | static bool shouldRetainObjCLifetime(Qualifiers::ObjCLifetime lifetime) { | ||||||||
| 2707 | switch (lifetime) { | ||||||||
| 2708 | case Qualifiers::OCL_None: | ||||||||
| 2709 | case Qualifiers::OCL_ExplicitNone: | ||||||||
| 2710 | case Qualifiers::OCL_Strong: | ||||||||
| 2711 | case Qualifiers::OCL_Autoreleasing: | ||||||||
| 2712 | return true; | ||||||||
| 2713 | |||||||||
| 2714 | case Qualifiers::OCL_Weak: | ||||||||
| 2715 | return false; | ||||||||
| 2716 | } | ||||||||
| 2717 | |||||||||
| 2718 | llvm_unreachable("impossible lifetime!")::llvm::llvm_unreachable_internal("impossible lifetime!", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2718); | ||||||||
| 2719 | } | ||||||||
| 2720 | |||||||||
| 2721 | static TryEmitResult tryEmitARCRetainLoadOfScalar(CodeGenFunction &CGF, | ||||||||
| 2722 | LValue lvalue, | ||||||||
| 2723 | QualType type) { | ||||||||
| 2724 | llvm::Value *result; | ||||||||
| 2725 | bool shouldRetain = shouldRetainObjCLifetime(type.getObjCLifetime()); | ||||||||
| 2726 | if (shouldRetain) { | ||||||||
| 2727 | result = CGF.EmitLoadOfLValue(lvalue, SourceLocation()).getScalarVal(); | ||||||||
| 2728 | } else { | ||||||||
| 2729 | assert(type.getObjCLifetime() == Qualifiers::OCL_Weak)((type.getObjCLifetime() == Qualifiers::OCL_Weak) ? static_cast <void> (0) : __assert_fail ("type.getObjCLifetime() == Qualifiers::OCL_Weak" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2729, __PRETTY_FUNCTION__)); | ||||||||
| 2730 | result = CGF.EmitARCLoadWeakRetained(lvalue.getAddress(CGF)); | ||||||||
| 2731 | } | ||||||||
| 2732 | return TryEmitResult(result, !shouldRetain); | ||||||||
| 2733 | } | ||||||||
| 2734 | |||||||||
| 2735 | static TryEmitResult tryEmitARCRetainLoadOfScalar(CodeGenFunction &CGF, | ||||||||
| 2736 | const Expr *e) { | ||||||||
| 2737 | e = e->IgnoreParens(); | ||||||||
| 2738 | QualType type = e->getType(); | ||||||||
| 2739 | |||||||||
| 2740 | // If we're loading retained from a __strong xvalue, we can avoid | ||||||||
| 2741 | // an extra retain/release pair by zeroing out the source of this | ||||||||
| 2742 | // "move" operation. | ||||||||
| 2743 | if (e->isXValue() && | ||||||||
| 2744 | !type.isConstQualified() && | ||||||||
| 2745 | type.getObjCLifetime() == Qualifiers::OCL_Strong) { | ||||||||
| 2746 | // Emit the lvalue. | ||||||||
| 2747 | LValue lv = CGF.EmitLValue(e); | ||||||||
| 2748 | |||||||||
| 2749 | // Load the object pointer. | ||||||||
| 2750 | llvm::Value *result = CGF.EmitLoadOfLValue(lv, | ||||||||
| 2751 | SourceLocation()).getScalarVal(); | ||||||||
| 2752 | |||||||||
| 2753 | // Set the source pointer to NULL. | ||||||||
| 2754 | CGF.EmitStoreOfScalar(getNullForVariable(lv.getAddress(CGF)), lv); | ||||||||
| 2755 | |||||||||
| 2756 | return TryEmitResult(result, true); | ||||||||
| 2757 | } | ||||||||
| 2758 | |||||||||
| 2759 | // As a very special optimization, in ARC++, if the l-value is the | ||||||||
| 2760 | // result of a non-volatile assignment, do a simple retain of the | ||||||||
| 2761 | // result of the call to objc_storeWeak instead of reloading. | ||||||||
| 2762 | if (CGF.getLangOpts().CPlusPlus && | ||||||||
| 2763 | !type.isVolatileQualified() && | ||||||||
| 2764 | type.getObjCLifetime() == Qualifiers::OCL_Weak && | ||||||||
| 2765 | isa<BinaryOperator>(e) && | ||||||||
| 2766 | cast<BinaryOperator>(e)->getOpcode() == BO_Assign) | ||||||||
| 2767 | return TryEmitResult(CGF.EmitScalarExpr(e), false); | ||||||||
| 2768 | |||||||||
| 2769 | // Try to emit code for scalar constant instead of emitting LValue and | ||||||||
| 2770 | // loading it because we are not guaranteed to have an l-value. One of such | ||||||||
| 2771 | // cases is DeclRefExpr referencing non-odr-used constant-evaluated variable. | ||||||||
| 2772 | if (const auto *decl_expr = dyn_cast<DeclRefExpr>(e)) { | ||||||||
| 2773 | auto *DRE = const_cast<DeclRefExpr *>(decl_expr); | ||||||||
| 2774 | if (CodeGenFunction::ConstantEmission constant = CGF.tryEmitAsConstant(DRE)) | ||||||||
| 2775 | return TryEmitResult(CGF.emitScalarConstant(constant, DRE), | ||||||||
| 2776 | !shouldRetainObjCLifetime(type.getObjCLifetime())); | ||||||||
| 2777 | } | ||||||||
| 2778 | |||||||||
| 2779 | return tryEmitARCRetainLoadOfScalar(CGF, CGF.EmitLValue(e), type); | ||||||||
| 2780 | } | ||||||||
| 2781 | |||||||||
| 2782 | typedef llvm::function_ref<llvm::Value *(CodeGenFunction &CGF, | ||||||||
| 2783 | llvm::Value *value)> | ||||||||
| 2784 | ValueTransform; | ||||||||
| 2785 | |||||||||
| 2786 | /// Insert code immediately after a call. | ||||||||
| 2787 | static llvm::Value *emitARCOperationAfterCall(CodeGenFunction &CGF, | ||||||||
| 2788 | llvm::Value *value, | ||||||||
| 2789 | ValueTransform doAfterCall, | ||||||||
| 2790 | ValueTransform doFallback) { | ||||||||
| 2791 | if (llvm::CallInst *call = dyn_cast<llvm::CallInst>(value)) { | ||||||||
| 2792 | CGBuilderTy::InsertPoint ip = CGF.Builder.saveIP(); | ||||||||
| 2793 | |||||||||
| 2794 | // Place the retain immediately following the call. | ||||||||
| 2795 | CGF.Builder.SetInsertPoint(call->getParent(), | ||||||||
| 2796 | ++llvm::BasicBlock::iterator(call)); | ||||||||
| 2797 | value = doAfterCall(CGF, value); | ||||||||
| 2798 | |||||||||
| 2799 | CGF.Builder.restoreIP(ip); | ||||||||
| 2800 | return value; | ||||||||
| 2801 | } else if (llvm::InvokeInst *invoke = dyn_cast<llvm::InvokeInst>(value)) { | ||||||||
| 2802 | CGBuilderTy::InsertPoint ip = CGF.Builder.saveIP(); | ||||||||
| 2803 | |||||||||
| 2804 | // Place the retain at the beginning of the normal destination block. | ||||||||
| 2805 | llvm::BasicBlock *BB = invoke->getNormalDest(); | ||||||||
| 2806 | CGF.Builder.SetInsertPoint(BB, BB->begin()); | ||||||||
| 2807 | value = doAfterCall(CGF, value); | ||||||||
| 2808 | |||||||||
| 2809 | CGF.Builder.restoreIP(ip); | ||||||||
| 2810 | return value; | ||||||||
| 2811 | |||||||||
| 2812 | // Bitcasts can arise because of related-result returns. Rewrite | ||||||||
| 2813 | // the operand. | ||||||||
| 2814 | } else if (llvm::BitCastInst *bitcast = dyn_cast<llvm::BitCastInst>(value)) { | ||||||||
| 2815 | llvm::Value *operand = bitcast->getOperand(0); | ||||||||
| 2816 | operand = emitARCOperationAfterCall(CGF, operand, doAfterCall, doFallback); | ||||||||
| 2817 | bitcast->setOperand(0, operand); | ||||||||
| 2818 | return bitcast; | ||||||||
| 2819 | |||||||||
| 2820 | // Generic fall-back case. | ||||||||
| 2821 | } else { | ||||||||
| 2822 | // Retain using the non-block variant: we never need to do a copy | ||||||||
| 2823 | // of a block that's been returned to us. | ||||||||
| 2824 | return doFallback(CGF, value); | ||||||||
| 2825 | } | ||||||||
| 2826 | } | ||||||||
| 2827 | |||||||||
| 2828 | /// Given that the given expression is some sort of call (which does | ||||||||
| 2829 | /// not return retained), emit a retain following it. | ||||||||
| 2830 | static llvm::Value *emitARCRetainCallResult(CodeGenFunction &CGF, | ||||||||
| 2831 | const Expr *e) { | ||||||||
| 2832 | llvm::Value *value = CGF.EmitScalarExpr(e); | ||||||||
| 2833 | return emitARCOperationAfterCall(CGF, value, | ||||||||
| 2834 | [](CodeGenFunction &CGF, llvm::Value *value) { | ||||||||
| 2835 | return CGF.EmitARCRetainAutoreleasedReturnValue(value); | ||||||||
| 2836 | }, | ||||||||
| 2837 | [](CodeGenFunction &CGF, llvm::Value *value) { | ||||||||
| 2838 | return CGF.EmitARCRetainNonBlock(value); | ||||||||
| 2839 | }); | ||||||||
| 2840 | } | ||||||||
| 2841 | |||||||||
| 2842 | /// Given that the given expression is some sort of call (which does | ||||||||
| 2843 | /// not return retained), perform an unsafeClaim following it. | ||||||||
| 2844 | static llvm::Value *emitARCUnsafeClaimCallResult(CodeGenFunction &CGF, | ||||||||
| 2845 | const Expr *e) { | ||||||||
| 2846 | llvm::Value *value = CGF.EmitScalarExpr(e); | ||||||||
| 2847 | return emitARCOperationAfterCall(CGF, value, | ||||||||
| 2848 | [](CodeGenFunction &CGF, llvm::Value *value) { | ||||||||
| 2849 | return CGF.EmitARCUnsafeClaimAutoreleasedReturnValue(value); | ||||||||
| 2850 | }, | ||||||||
| 2851 | [](CodeGenFunction &CGF, llvm::Value *value) { | ||||||||
| 2852 | return value; | ||||||||
| 2853 | }); | ||||||||
| 2854 | } | ||||||||
| 2855 | |||||||||
| 2856 | llvm::Value *CodeGenFunction::EmitARCReclaimReturnedObject(const Expr *E, | ||||||||
| 2857 | bool allowUnsafeClaim) { | ||||||||
| 2858 | if (allowUnsafeClaim && | ||||||||
| 2859 | CGM.getLangOpts().ObjCRuntime.hasARCUnsafeClaimAutoreleasedReturnValue()) { | ||||||||
| 2860 | return emitARCUnsafeClaimCallResult(*this, E); | ||||||||
| 2861 | } else { | ||||||||
| 2862 | llvm::Value *value = emitARCRetainCallResult(*this, E); | ||||||||
| 2863 | return EmitObjCConsumeObject(E->getType(), value); | ||||||||
| 2864 | } | ||||||||
| 2865 | } | ||||||||
| 2866 | |||||||||
| 2867 | /// Determine whether it might be important to emit a separate | ||||||||
| 2868 | /// objc_retain_block on the result of the given expression, or | ||||||||
| 2869 | /// whether it's okay to just emit it in a +1 context. | ||||||||
| 2870 | static bool shouldEmitSeparateBlockRetain(const Expr *e) { | ||||||||
| 2871 | assert(e->getType()->isBlockPointerType())((e->getType()->isBlockPointerType()) ? static_cast< void> (0) : __assert_fail ("e->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2871, __PRETTY_FUNCTION__)); | ||||||||
| 2872 | e = e->IgnoreParens(); | ||||||||
| 2873 | |||||||||
| 2874 | // For future goodness, emit block expressions directly in +1 | ||||||||
| 2875 | // contexts if we can. | ||||||||
| 2876 | if (isa<BlockExpr>(e)) | ||||||||
| 2877 | return false; | ||||||||
| 2878 | |||||||||
| 2879 | if (const CastExpr *cast = dyn_cast<CastExpr>(e)) { | ||||||||
| 2880 | switch (cast->getCastKind()) { | ||||||||
| 2881 | // Emitting these operations in +1 contexts is goodness. | ||||||||
| 2882 | case CK_LValueToRValue: | ||||||||
| 2883 | case CK_ARCReclaimReturnedObject: | ||||||||
| 2884 | case CK_ARCConsumeObject: | ||||||||
| 2885 | case CK_ARCProduceObject: | ||||||||
| 2886 | return false; | ||||||||
| 2887 | |||||||||
| 2888 | // These operations preserve a block type. | ||||||||
| 2889 | case CK_NoOp: | ||||||||
| 2890 | case CK_BitCast: | ||||||||
| 2891 | return shouldEmitSeparateBlockRetain(cast->getSubExpr()); | ||||||||
| 2892 | |||||||||
| 2893 | // These operations are known to be bad (or haven't been considered). | ||||||||
| 2894 | case CK_AnyPointerToBlockPointerCast: | ||||||||
| 2895 | default: | ||||||||
| 2896 | return true; | ||||||||
| 2897 | } | ||||||||
| 2898 | } | ||||||||
| 2899 | |||||||||
| 2900 | return true; | ||||||||
| 2901 | } | ||||||||
| 2902 | |||||||||
| 2903 | namespace { | ||||||||
| 2904 | /// A CRTP base class for emitting expressions of retainable object | ||||||||
| 2905 | /// pointer type in ARC. | ||||||||
| 2906 | template <typename Impl, typename Result> class ARCExprEmitter { | ||||||||
| 2907 | protected: | ||||||||
| 2908 | CodeGenFunction &CGF; | ||||||||
| 2909 | Impl &asImpl() { return *static_cast<Impl*>(this); } | ||||||||
| 2910 | |||||||||
| 2911 | ARCExprEmitter(CodeGenFunction &CGF) : CGF(CGF) {} | ||||||||
| 2912 | |||||||||
| 2913 | public: | ||||||||
| 2914 | Result visit(const Expr *e); | ||||||||
| 2915 | Result visitCastExpr(const CastExpr *e); | ||||||||
| 2916 | Result visitPseudoObjectExpr(const PseudoObjectExpr *e); | ||||||||
| 2917 | Result visitBlockExpr(const BlockExpr *e); | ||||||||
| 2918 | Result visitBinaryOperator(const BinaryOperator *e); | ||||||||
| 2919 | Result visitBinAssign(const BinaryOperator *e); | ||||||||
| 2920 | Result visitBinAssignUnsafeUnretained(const BinaryOperator *e); | ||||||||
| 2921 | Result visitBinAssignAutoreleasing(const BinaryOperator *e); | ||||||||
| 2922 | Result visitBinAssignWeak(const BinaryOperator *e); | ||||||||
| 2923 | Result visitBinAssignStrong(const BinaryOperator *e); | ||||||||
| 2924 | |||||||||
| 2925 | // Minimal implementation: | ||||||||
| 2926 | // Result visitLValueToRValue(const Expr *e) | ||||||||
| 2927 | // Result visitConsumeObject(const Expr *e) | ||||||||
| 2928 | // Result visitExtendBlockObject(const Expr *e) | ||||||||
| 2929 | // Result visitReclaimReturnedObject(const Expr *e) | ||||||||
| 2930 | // Result visitCall(const Expr *e) | ||||||||
| 2931 | // Result visitExpr(const Expr *e) | ||||||||
| 2932 | // | ||||||||
| 2933 | // Result emitBitCast(Result result, llvm::Type *resultType) | ||||||||
| 2934 | // llvm::Value *getValueOfResult(Result result) | ||||||||
| 2935 | }; | ||||||||
| 2936 | } | ||||||||
| 2937 | |||||||||
| 2938 | /// Try to emit a PseudoObjectExpr under special ARC rules. | ||||||||
| 2939 | /// | ||||||||
| 2940 | /// This massively duplicates emitPseudoObjectRValue. | ||||||||
| 2941 | template <typename Impl, typename Result> | ||||||||
| 2942 | Result | ||||||||
| 2943 | ARCExprEmitter<Impl,Result>::visitPseudoObjectExpr(const PseudoObjectExpr *E) { | ||||||||
| 2944 | SmallVector<CodeGenFunction::OpaqueValueMappingData, 4> opaques; | ||||||||
| 2945 | |||||||||
| 2946 | // Find the result expression. | ||||||||
| 2947 | const Expr *resultExpr = E->getResultExpr(); | ||||||||
| 2948 | assert(resultExpr)((resultExpr) ? static_cast<void> (0) : __assert_fail ( "resultExpr", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2948, __PRETTY_FUNCTION__)); | ||||||||
| 2949 | Result result; | ||||||||
| 2950 | |||||||||
| 2951 | for (PseudoObjectExpr::const_semantics_iterator | ||||||||
| 2952 | i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) { | ||||||||
| 2953 | const Expr *semantic = *i; | ||||||||
| 2954 | |||||||||
| 2955 | // If this semantic expression is an opaque value, bind it | ||||||||
| 2956 | // to the result of its source expression. | ||||||||
| 2957 | if (const OpaqueValueExpr *ov = dyn_cast<OpaqueValueExpr>(semantic)) { | ||||||||
| 2958 | typedef CodeGenFunction::OpaqueValueMappingData OVMA; | ||||||||
| 2959 | OVMA opaqueData; | ||||||||
| 2960 | |||||||||
| 2961 | // If this semantic is the result of the pseudo-object | ||||||||
| 2962 | // expression, try to evaluate the source as +1. | ||||||||
| 2963 | if (ov == resultExpr) { | ||||||||
| 2964 | assert(!OVMA::shouldBindAsLValue(ov))((!OVMA::shouldBindAsLValue(ov)) ? static_cast<void> (0 ) : __assert_fail ("!OVMA::shouldBindAsLValue(ov)", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 2964, __PRETTY_FUNCTION__)); | ||||||||
| 2965 | result = asImpl().visit(ov->getSourceExpr()); | ||||||||
| 2966 | opaqueData = OVMA::bind(CGF, ov, | ||||||||
| 2967 | RValue::get(asImpl().getValueOfResult(result))); | ||||||||
| 2968 | |||||||||
| 2969 | // Otherwise, just bind it. | ||||||||
| 2970 | } else { | ||||||||
| 2971 | opaqueData = OVMA::bind(CGF, ov, ov->getSourceExpr()); | ||||||||
| 2972 | } | ||||||||
| 2973 | opaques.push_back(opaqueData); | ||||||||
| 2974 | |||||||||
| 2975 | // Otherwise, if the expression is the result, evaluate it | ||||||||
| 2976 | // and remember the result. | ||||||||
| 2977 | } else if (semantic == resultExpr) { | ||||||||
| 2978 | result = asImpl().visit(semantic); | ||||||||
| 2979 | |||||||||
| 2980 | // Otherwise, evaluate the expression in an ignored context. | ||||||||
| 2981 | } else { | ||||||||
| 2982 | CGF.EmitIgnoredExpr(semantic); | ||||||||
| 2983 | } | ||||||||
| 2984 | } | ||||||||
| 2985 | |||||||||
| 2986 | // Unbind all the opaques now. | ||||||||
| 2987 | for (unsigned i = 0, e = opaques.size(); i != e; ++i) | ||||||||
| 2988 | opaques[i].unbind(CGF); | ||||||||
| 2989 | |||||||||
| 2990 | return result; | ||||||||
| 2991 | } | ||||||||
| 2992 | |||||||||
| 2993 | template <typename Impl, typename Result> | ||||||||
| 2994 | Result ARCExprEmitter<Impl, Result>::visitBlockExpr(const BlockExpr *e) { | ||||||||
| 2995 | // The default implementation just forwards the expression to visitExpr. | ||||||||
| 2996 | return asImpl().visitExpr(e); | ||||||||
| 2997 | } | ||||||||
| 2998 | |||||||||
| 2999 | template <typename Impl, typename Result> | ||||||||
| 3000 | Result ARCExprEmitter<Impl,Result>::visitCastExpr(const CastExpr *e) { | ||||||||
| 3001 | switch (e->getCastKind()) { | ||||||||
| 3002 | |||||||||
| 3003 | // No-op casts don't change the type, so we just ignore them. | ||||||||
| 3004 | case CK_NoOp: | ||||||||
| 3005 | return asImpl().visit(e->getSubExpr()); | ||||||||
| 3006 | |||||||||
| 3007 | // These casts can change the type. | ||||||||
| 3008 | case CK_CPointerToObjCPointerCast: | ||||||||
| 3009 | case CK_BlockPointerToObjCPointerCast: | ||||||||
| 3010 | case CK_AnyPointerToBlockPointerCast: | ||||||||
| 3011 | case CK_BitCast: { | ||||||||
| 3012 | llvm::Type *resultType = CGF.ConvertType(e->getType()); | ||||||||
| 3013 | assert(e->getSubExpr()->getType()->hasPointerRepresentation())((e->getSubExpr()->getType()->hasPointerRepresentation ()) ? static_cast<void> (0) : __assert_fail ("e->getSubExpr()->getType()->hasPointerRepresentation()" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 3013, __PRETTY_FUNCTION__)); | ||||||||
| 3014 | Result result = asImpl().visit(e->getSubExpr()); | ||||||||
| 3015 | return asImpl().emitBitCast(result, resultType); | ||||||||
| 3016 | } | ||||||||
| 3017 | |||||||||
| 3018 | // Handle some casts specially. | ||||||||
| 3019 | case CK_LValueToRValue: | ||||||||
| 3020 | return asImpl().visitLValueToRValue(e->getSubExpr()); | ||||||||
| 3021 | case CK_ARCConsumeObject: | ||||||||
| 3022 | return asImpl().visitConsumeObject(e->getSubExpr()); | ||||||||
| 3023 | case CK_ARCExtendBlockObject: | ||||||||
| 3024 | return asImpl().visitExtendBlockObject(e->getSubExpr()); | ||||||||
| 3025 | case CK_ARCReclaimReturnedObject: | ||||||||
| 3026 | return asImpl().visitReclaimReturnedObject(e->getSubExpr()); | ||||||||
| 3027 | |||||||||
| 3028 | // Otherwise, use the default logic. | ||||||||
| 3029 | default: | ||||||||
| 3030 | return asImpl().visitExpr(e); | ||||||||
| 3031 | } | ||||||||
| 3032 | } | ||||||||
| 3033 | |||||||||
| 3034 | template <typename Impl, typename Result> | ||||||||
| 3035 | Result | ||||||||
| 3036 | ARCExprEmitter<Impl,Result>::visitBinaryOperator(const BinaryOperator *e) { | ||||||||
| 3037 | switch (e->getOpcode()) { | ||||||||
| 3038 | case BO_Comma: | ||||||||
| 3039 | CGF.EmitIgnoredExpr(e->getLHS()); | ||||||||
| 3040 | CGF.EnsureInsertPoint(); | ||||||||
| 3041 | return asImpl().visit(e->getRHS()); | ||||||||
| 3042 | |||||||||
| 3043 | case BO_Assign: | ||||||||
| 3044 | return asImpl().visitBinAssign(e); | ||||||||
| 3045 | |||||||||
| 3046 | default: | ||||||||
| 3047 | return asImpl().visitExpr(e); | ||||||||
| 3048 | } | ||||||||
| 3049 | } | ||||||||
| 3050 | |||||||||
| 3051 | template <typename Impl, typename Result> | ||||||||
| 3052 | Result ARCExprEmitter<Impl,Result>::visitBinAssign(const BinaryOperator *e) { | ||||||||
| 3053 | switch (e->getLHS()->getType().getObjCLifetime()) { | ||||||||
| 3054 | case Qualifiers::OCL_ExplicitNone: | ||||||||
| 3055 | return asImpl().visitBinAssignUnsafeUnretained(e); | ||||||||
| 3056 | |||||||||
| 3057 | case Qualifiers::OCL_Weak: | ||||||||
| 3058 | return asImpl().visitBinAssignWeak(e); | ||||||||
| 3059 | |||||||||
| 3060 | case Qualifiers::OCL_Autoreleasing: | ||||||||
| 3061 | return asImpl().visitBinAssignAutoreleasing(e); | ||||||||
| 3062 | |||||||||
| 3063 | case Qualifiers::OCL_Strong: | ||||||||
| 3064 | return asImpl().visitBinAssignStrong(e); | ||||||||
| 3065 | |||||||||
| 3066 | case Qualifiers::OCL_None: | ||||||||
| 3067 | return asImpl().visitExpr(e); | ||||||||
| 3068 | } | ||||||||
| 3069 | llvm_unreachable("bad ObjC ownership qualifier")::llvm::llvm_unreachable_internal("bad ObjC ownership qualifier" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 3069); | ||||||||
| 3070 | } | ||||||||
| 3071 | |||||||||
| 3072 | /// The default rule for __unsafe_unretained emits the RHS recursively, | ||||||||
| 3073 | /// stores into the unsafe variable, and propagates the result outward. | ||||||||
| 3074 | template <typename Impl, typename Result> | ||||||||
| 3075 | Result ARCExprEmitter<Impl,Result>:: | ||||||||
| 3076 | visitBinAssignUnsafeUnretained(const BinaryOperator *e) { | ||||||||
| 3077 | // Recursively emit the RHS. | ||||||||
| 3078 | // For __block safety, do this before emitting the LHS. | ||||||||
| 3079 | Result result = asImpl().visit(e->getRHS()); | ||||||||
| 3080 | |||||||||
| 3081 | // Perform the store. | ||||||||
| 3082 | LValue lvalue = | ||||||||
| 3083 | CGF.EmitCheckedLValue(e->getLHS(), CodeGenFunction::TCK_Store); | ||||||||
| 3084 | CGF.EmitStoreThroughLValue(RValue::get(asImpl().getValueOfResult(result)), | ||||||||
| 3085 | lvalue); | ||||||||
| 3086 | |||||||||
| 3087 | return result; | ||||||||
| 3088 | } | ||||||||
| 3089 | |||||||||
| 3090 | template <typename Impl, typename Result> | ||||||||
| 3091 | Result | ||||||||
| 3092 | ARCExprEmitter<Impl,Result>::visitBinAssignAutoreleasing(const BinaryOperator *e) { | ||||||||
| 3093 | return asImpl().visitExpr(e); | ||||||||
| 3094 | } | ||||||||
| 3095 | |||||||||
| 3096 | template <typename Impl, typename Result> | ||||||||
| 3097 | Result | ||||||||
| 3098 | ARCExprEmitter<Impl,Result>::visitBinAssignWeak(const BinaryOperator *e) { | ||||||||
| 3099 | return asImpl().visitExpr(e); | ||||||||
| 3100 | } | ||||||||
| 3101 | |||||||||
| 3102 | template <typename Impl, typename Result> | ||||||||
| 3103 | Result | ||||||||
| 3104 | ARCExprEmitter<Impl,Result>::visitBinAssignStrong(const BinaryOperator *e) { | ||||||||
| 3105 | return asImpl().visitExpr(e); | ||||||||
| 3106 | } | ||||||||
| 3107 | |||||||||
| 3108 | /// The general expression-emission logic. | ||||||||
| 3109 | template <typename Impl, typename Result> | ||||||||
| 3110 | Result ARCExprEmitter<Impl,Result>::visit(const Expr *e) { | ||||||||
| 3111 | // We should *never* see a nested full-expression here, because if | ||||||||
| 3112 | // we fail to emit at +1, our caller must not retain after we close | ||||||||
| 3113 | // out the full-expression. This isn't as important in the unsafe | ||||||||
| 3114 | // emitter. | ||||||||
| 3115 | assert(!isa<ExprWithCleanups>(e))((!isa<ExprWithCleanups>(e)) ? static_cast<void> ( 0) : __assert_fail ("!isa<ExprWithCleanups>(e)", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 3115, __PRETTY_FUNCTION__)); | ||||||||
| 3116 | |||||||||
| 3117 | // Look through parens, __extension__, generic selection, etc. | ||||||||
| 3118 | e = e->IgnoreParens(); | ||||||||
| 3119 | |||||||||
| 3120 | // Handle certain kinds of casts. | ||||||||
| 3121 | if (const CastExpr *ce = dyn_cast<CastExpr>(e)) { | ||||||||
| 3122 | return asImpl().visitCastExpr(ce); | ||||||||
| 3123 | |||||||||
| 3124 | // Handle the comma operator. | ||||||||
| 3125 | } else if (auto op = dyn_cast<BinaryOperator>(e)) { | ||||||||
| 3126 | return asImpl().visitBinaryOperator(op); | ||||||||
| 3127 | |||||||||
| 3128 | // TODO: handle conditional operators here | ||||||||
| 3129 | |||||||||
| 3130 | // For calls and message sends, use the retained-call logic. | ||||||||
| 3131 | // Delegate inits are a special case in that they're the only | ||||||||
| 3132 | // returns-retained expression that *isn't* surrounded by | ||||||||
| 3133 | // a consume. | ||||||||
| 3134 | } else if (isa<CallExpr>(e) || | ||||||||
| 3135 | (isa<ObjCMessageExpr>(e) && | ||||||||
| 3136 | !cast<ObjCMessageExpr>(e)->isDelegateInitCall())) { | ||||||||
| 3137 | return asImpl().visitCall(e); | ||||||||
| 3138 | |||||||||
| 3139 | // Look through pseudo-object expressions. | ||||||||
| 3140 | } else if (const PseudoObjectExpr *pseudo = dyn_cast<PseudoObjectExpr>(e)) { | ||||||||
| 3141 | return asImpl().visitPseudoObjectExpr(pseudo); | ||||||||
| 3142 | } else if (auto *be = dyn_cast<BlockExpr>(e)) | ||||||||
| 3143 | return asImpl().visitBlockExpr(be); | ||||||||
| 3144 | |||||||||
| 3145 | return asImpl().visitExpr(e); | ||||||||
| 3146 | } | ||||||||
| 3147 | |||||||||
| 3148 | namespace { | ||||||||
| 3149 | |||||||||
| 3150 | /// An emitter for +1 results. | ||||||||
| 3151 | struct ARCRetainExprEmitter : | ||||||||
| 3152 | public ARCExprEmitter<ARCRetainExprEmitter, TryEmitResult> { | ||||||||
| 3153 | |||||||||
| 3154 | ARCRetainExprEmitter(CodeGenFunction &CGF) : ARCExprEmitter(CGF) {} | ||||||||
| 3155 | |||||||||
| 3156 | llvm::Value *getValueOfResult(TryEmitResult result) { | ||||||||
| 3157 | return result.getPointer(); | ||||||||
| 3158 | } | ||||||||
| 3159 | |||||||||
| 3160 | TryEmitResult emitBitCast(TryEmitResult result, llvm::Type *resultType) { | ||||||||
| 3161 | llvm::Value *value = result.getPointer(); | ||||||||
| 3162 | value = CGF.Builder.CreateBitCast(value, resultType); | ||||||||
| 3163 | result.setPointer(value); | ||||||||
| 3164 | return result; | ||||||||
| 3165 | } | ||||||||
| 3166 | |||||||||
| 3167 | TryEmitResult visitLValueToRValue(const Expr *e) { | ||||||||
| 3168 | return tryEmitARCRetainLoadOfScalar(CGF, e); | ||||||||
| 3169 | } | ||||||||
| 3170 | |||||||||
| 3171 | /// For consumptions, just emit the subexpression and thus elide | ||||||||
| 3172 | /// the retain/release pair. | ||||||||
| 3173 | TryEmitResult visitConsumeObject(const Expr *e) { | ||||||||
| 3174 | llvm::Value *result = CGF.EmitScalarExpr(e); | ||||||||
| 3175 | return TryEmitResult(result, true); | ||||||||
| 3176 | } | ||||||||
| 3177 | |||||||||
| 3178 | TryEmitResult visitBlockExpr(const BlockExpr *e) { | ||||||||
| 3179 | TryEmitResult result = visitExpr(e); | ||||||||
| 3180 | // Avoid the block-retain if this is a block literal that doesn't need to be | ||||||||
| 3181 | // copied to the heap. | ||||||||
| 3182 | if (e->getBlockDecl()->canAvoidCopyToHeap()) | ||||||||
| 3183 | result.setInt(true); | ||||||||
| 3184 | return result; | ||||||||
| 3185 | } | ||||||||
| 3186 | |||||||||
| 3187 | /// Block extends are net +0. Naively, we could just recurse on | ||||||||
| 3188 | /// the subexpression, but actually we need to ensure that the | ||||||||
| 3189 | /// value is copied as a block, so there's a little filter here. | ||||||||
| 3190 | TryEmitResult visitExtendBlockObject(const Expr *e) { | ||||||||
| 3191 | llvm::Value *result; // will be a +0 value | ||||||||
| 3192 | |||||||||
| 3193 | // If we can't safely assume the sub-expression will produce a | ||||||||
| 3194 | // block-copied value, emit the sub-expression at +0. | ||||||||
| 3195 | if (shouldEmitSeparateBlockRetain(e)) { | ||||||||
| 3196 | result = CGF.EmitScalarExpr(e); | ||||||||
| 3197 | |||||||||
| 3198 | // Otherwise, try to emit the sub-expression at +1 recursively. | ||||||||
| 3199 | } else { | ||||||||
| 3200 | TryEmitResult subresult = asImpl().visit(e); | ||||||||
| 3201 | |||||||||
| 3202 | // If that produced a retained value, just use that. | ||||||||
| 3203 | if (subresult.getInt()) { | ||||||||
| 3204 | return subresult; | ||||||||
| 3205 | } | ||||||||
| 3206 | |||||||||
| 3207 | // Otherwise it's +0. | ||||||||
| 3208 | result = subresult.getPointer(); | ||||||||
| 3209 | } | ||||||||
| 3210 | |||||||||
| 3211 | // Retain the object as a block. | ||||||||
| 3212 | result = CGF.EmitARCRetainBlock(result, /*mandatory*/ true); | ||||||||
| 3213 | return TryEmitResult(result, true); | ||||||||
| 3214 | } | ||||||||
| 3215 | |||||||||
| 3216 | /// For reclaims, emit the subexpression as a retained call and | ||||||||
| 3217 | /// skip the consumption. | ||||||||
| 3218 | TryEmitResult visitReclaimReturnedObject(const Expr *e) { | ||||||||
| 3219 | llvm::Value *result = emitARCRetainCallResult(CGF, e); | ||||||||
| 3220 | return TryEmitResult(result, true); | ||||||||
| 3221 | } | ||||||||
| 3222 | |||||||||
| 3223 | /// When we have an undecorated call, retroactively do a claim. | ||||||||
| 3224 | TryEmitResult visitCall(const Expr *e) { | ||||||||
| 3225 | llvm::Value *result = emitARCRetainCallResult(CGF, e); | ||||||||
| 3226 | return TryEmitResult(result, true); | ||||||||
| 3227 | } | ||||||||
| 3228 | |||||||||
| 3229 | // TODO: maybe special-case visitBinAssignWeak? | ||||||||
| 3230 | |||||||||
| 3231 | TryEmitResult visitExpr(const Expr *e) { | ||||||||
| 3232 | // We didn't find an obvious production, so emit what we've got and | ||||||||
| 3233 | // tell the caller that we didn't manage to retain. | ||||||||
| 3234 | llvm::Value *result = CGF.EmitScalarExpr(e); | ||||||||
| 3235 | return TryEmitResult(result, false); | ||||||||
| 3236 | } | ||||||||
| 3237 | }; | ||||||||
| 3238 | } | ||||||||
| 3239 | |||||||||
| 3240 | static TryEmitResult | ||||||||
| 3241 | tryEmitARCRetainScalarExpr(CodeGenFunction &CGF, const Expr *e) { | ||||||||
| 3242 | return ARCRetainExprEmitter(CGF).visit(e); | ||||||||
| 3243 | } | ||||||||
| 3244 | |||||||||
| 3245 | static llvm::Value *emitARCRetainLoadOfScalar(CodeGenFunction &CGF, | ||||||||
| 3246 | LValue lvalue, | ||||||||
| 3247 | QualType type) { | ||||||||
| 3248 | TryEmitResult result = tryEmitARCRetainLoadOfScalar(CGF, lvalue, type); | ||||||||
| 3249 | llvm::Value *value = result.getPointer(); | ||||||||
| 3250 | if (!result.getInt()) | ||||||||
| 3251 | value = CGF.EmitARCRetain(type, value); | ||||||||
| 3252 | return value; | ||||||||
| 3253 | } | ||||||||
| 3254 | |||||||||
| 3255 | /// EmitARCRetainScalarExpr - Semantically equivalent to | ||||||||
| 3256 | /// EmitARCRetainObject(e->getType(), EmitScalarExpr(e)), but making a | ||||||||
| 3257 | /// best-effort attempt to peephole expressions that naturally produce | ||||||||
| 3258 | /// retained objects. | ||||||||
| 3259 | llvm::Value *CodeGenFunction::EmitARCRetainScalarExpr(const Expr *e) { | ||||||||
| 3260 | // The retain needs to happen within the full-expression. | ||||||||
| 3261 | if (const ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(e)) { | ||||||||
| 3262 | enterFullExpression(cleanups); | ||||||||
| 3263 | RunCleanupsScope scope(*this); | ||||||||
| 3264 | return EmitARCRetainScalarExpr(cleanups->getSubExpr()); | ||||||||
| 3265 | } | ||||||||
| 3266 | |||||||||
| 3267 | TryEmitResult result = tryEmitARCRetainScalarExpr(*this, e); | ||||||||
| 3268 | llvm::Value *value = result.getPointer(); | ||||||||
| 3269 | if (!result.getInt()) | ||||||||
| 3270 | value = EmitARCRetain(e->getType(), value); | ||||||||
| 3271 | return value; | ||||||||
| 3272 | } | ||||||||
| 3273 | |||||||||
| 3274 | llvm::Value * | ||||||||
| 3275 | CodeGenFunction::EmitARCRetainAutoreleaseScalarExpr(const Expr *e) { | ||||||||
| 3276 | // The retain needs to happen within the full-expression. | ||||||||
| 3277 | if (const ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(e)) { | ||||||||
| 3278 | enterFullExpression(cleanups); | ||||||||
| 3279 | RunCleanupsScope scope(*this); | ||||||||
| 3280 | return EmitARCRetainAutoreleaseScalarExpr(cleanups->getSubExpr()); | ||||||||
| 3281 | } | ||||||||
| 3282 | |||||||||
| 3283 | TryEmitResult result = tryEmitARCRetainScalarExpr(*this, e); | ||||||||
| 3284 | llvm::Value *value = result.getPointer(); | ||||||||
| 3285 | if (result.getInt()) | ||||||||
| 3286 | value = EmitARCAutorelease(value); | ||||||||
| 3287 | else | ||||||||
| 3288 | value = EmitARCRetainAutorelease(e->getType(), value); | ||||||||
| 3289 | return value; | ||||||||
| 3290 | } | ||||||||
| 3291 | |||||||||
| 3292 | llvm::Value *CodeGenFunction::EmitARCExtendBlockObject(const Expr *e) { | ||||||||
| 3293 | llvm::Value *result; | ||||||||
| 3294 | bool doRetain; | ||||||||
| 3295 | |||||||||
| 3296 | if (shouldEmitSeparateBlockRetain(e)) { | ||||||||
| 3297 | result = EmitScalarExpr(e); | ||||||||
| 3298 | doRetain = true; | ||||||||
| 3299 | } else { | ||||||||
| 3300 | TryEmitResult subresult = tryEmitARCRetainScalarExpr(*this, e); | ||||||||
| 3301 | result = subresult.getPointer(); | ||||||||
| 3302 | doRetain = !subresult.getInt(); | ||||||||
| 3303 | } | ||||||||
| 3304 | |||||||||
| 3305 | if (doRetain) | ||||||||
| 3306 | result = EmitARCRetainBlock(result, /*mandatory*/ true); | ||||||||
| 3307 | return EmitObjCConsumeObject(e->getType(), result); | ||||||||
| 3308 | } | ||||||||
| 3309 | |||||||||
| 3310 | llvm::Value *CodeGenFunction::EmitObjCThrowOperand(const Expr *expr) { | ||||||||
| 3311 | // In ARC, retain and autorelease the expression. | ||||||||
| 3312 | if (getLangOpts().ObjCAutoRefCount) { | ||||||||
| 3313 | // Do so before running any cleanups for the full-expression. | ||||||||
| 3314 | // EmitARCRetainAutoreleaseScalarExpr does this for us. | ||||||||
| 3315 | return EmitARCRetainAutoreleaseScalarExpr(expr); | ||||||||
| 3316 | } | ||||||||
| 3317 | |||||||||
| 3318 | // Otherwise, use the normal scalar-expression emission. The | ||||||||
| 3319 | // exception machinery doesn't do anything special with the | ||||||||
| 3320 | // exception like retaining it, so there's no safety associated with | ||||||||
| 3321 | // only running cleanups after the throw has started, and when it | ||||||||
| 3322 | // matters it tends to be substantially inferior code. | ||||||||
| 3323 | return EmitScalarExpr(expr); | ||||||||
| 3324 | } | ||||||||
| 3325 | |||||||||
| 3326 | namespace { | ||||||||
| 3327 | |||||||||
| 3328 | /// An emitter for assigning into an __unsafe_unretained context. | ||||||||
| 3329 | struct ARCUnsafeUnretainedExprEmitter : | ||||||||
| 3330 | public ARCExprEmitter<ARCUnsafeUnretainedExprEmitter, llvm::Value*> { | ||||||||
| 3331 | |||||||||
| 3332 | ARCUnsafeUnretainedExprEmitter(CodeGenFunction &CGF) : ARCExprEmitter(CGF) {} | ||||||||
| 3333 | |||||||||
| 3334 | llvm::Value *getValueOfResult(llvm::Value *value) { | ||||||||
| 3335 | return value; | ||||||||
| 3336 | } | ||||||||
| 3337 | |||||||||
| 3338 | llvm::Value *emitBitCast(llvm::Value *value, llvm::Type *resultType) { | ||||||||
| 3339 | return CGF.Builder.CreateBitCast(value, resultType); | ||||||||
| 3340 | } | ||||||||
| 3341 | |||||||||
| 3342 | llvm::Value *visitLValueToRValue(const Expr *e) { | ||||||||
| 3343 | return CGF.EmitScalarExpr(e); | ||||||||
| 3344 | } | ||||||||
| 3345 | |||||||||
| 3346 | /// For consumptions, just emit the subexpression and perform the | ||||||||
| 3347 | /// consumption like normal. | ||||||||
| 3348 | llvm::Value *visitConsumeObject(const Expr *e) { | ||||||||
| 3349 | llvm::Value *value = CGF.EmitScalarExpr(e); | ||||||||
| 3350 | return CGF.EmitObjCConsumeObject(e->getType(), value); | ||||||||
| 3351 | } | ||||||||
| 3352 | |||||||||
| 3353 | /// No special logic for block extensions. (This probably can't | ||||||||
| 3354 | /// actually happen in this emitter, though.) | ||||||||
| 3355 | llvm::Value *visitExtendBlockObject(const Expr *e) { | ||||||||
| 3356 | return CGF.EmitARCExtendBlockObject(e); | ||||||||
| 3357 | } | ||||||||
| 3358 | |||||||||
| 3359 | /// For reclaims, perform an unsafeClaim if that's enabled. | ||||||||
| 3360 | llvm::Value *visitReclaimReturnedObject(const Expr *e) { | ||||||||
| 3361 | return CGF.EmitARCReclaimReturnedObject(e, /*unsafe*/ true); | ||||||||
| 3362 | } | ||||||||
| 3363 | |||||||||
| 3364 | /// When we have an undecorated call, just emit it without adding | ||||||||
| 3365 | /// the unsafeClaim. | ||||||||
| 3366 | llvm::Value *visitCall(const Expr *e) { | ||||||||
| 3367 | return CGF.EmitScalarExpr(e); | ||||||||
| 3368 | } | ||||||||
| 3369 | |||||||||
| 3370 | /// Just do normal scalar emission in the default case. | ||||||||
| 3371 | llvm::Value *visitExpr(const Expr *e) { | ||||||||
| 3372 | return CGF.EmitScalarExpr(e); | ||||||||
| 3373 | } | ||||||||
| 3374 | }; | ||||||||
| 3375 | } | ||||||||
| 3376 | |||||||||
| 3377 | static llvm::Value *emitARCUnsafeUnretainedScalarExpr(CodeGenFunction &CGF, | ||||||||
| 3378 | const Expr *e) { | ||||||||
| 3379 | return ARCUnsafeUnretainedExprEmitter(CGF).visit(e); | ||||||||
| 3380 | } | ||||||||
| 3381 | |||||||||
| 3382 | /// EmitARCUnsafeUnretainedScalarExpr - Semantically equivalent to | ||||||||
| 3383 | /// immediately releasing the resut of EmitARCRetainScalarExpr, but | ||||||||
| 3384 | /// avoiding any spurious retains, including by performing reclaims | ||||||||
| 3385 | /// with objc_unsafeClaimAutoreleasedReturnValue. | ||||||||
| 3386 | llvm::Value *CodeGenFunction::EmitARCUnsafeUnretainedScalarExpr(const Expr *e) { | ||||||||
| 3387 | // Look through full-expressions. | ||||||||
| 3388 | if (const ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(e)) { | ||||||||
| 3389 | enterFullExpression(cleanups); | ||||||||
| 3390 | RunCleanupsScope scope(*this); | ||||||||
| 3391 | return emitARCUnsafeUnretainedScalarExpr(*this, cleanups->getSubExpr()); | ||||||||
| 3392 | } | ||||||||
| 3393 | |||||||||
| 3394 | return emitARCUnsafeUnretainedScalarExpr(*this, e); | ||||||||
| 3395 | } | ||||||||
| 3396 | |||||||||
| 3397 | std::pair<LValue,llvm::Value*> | ||||||||
| 3398 | CodeGenFunction::EmitARCStoreUnsafeUnretained(const BinaryOperator *e, | ||||||||
| 3399 | bool ignored) { | ||||||||
| 3400 | // Evaluate the RHS first. If we're ignoring the result, assume | ||||||||
| 3401 | // that we can emit at an unsafe +0. | ||||||||
| 3402 | llvm::Value *value; | ||||||||
| 3403 | if (ignored) { | ||||||||
| 3404 | value = EmitARCUnsafeUnretainedScalarExpr(e->getRHS()); | ||||||||
| 3405 | } else { | ||||||||
| 3406 | value = EmitScalarExpr(e->getRHS()); | ||||||||
| 3407 | } | ||||||||
| 3408 | |||||||||
| 3409 | // Emit the LHS and perform the store. | ||||||||
| 3410 | LValue lvalue = EmitLValue(e->getLHS()); | ||||||||
| 3411 | EmitStoreOfScalar(value, lvalue); | ||||||||
| 3412 | |||||||||
| 3413 | return std::pair<LValue,llvm::Value*>(std::move(lvalue), value); | ||||||||
| 3414 | } | ||||||||
| 3415 | |||||||||
| 3416 | std::pair<LValue,llvm::Value*> | ||||||||
| 3417 | CodeGenFunction::EmitARCStoreStrong(const BinaryOperator *e, | ||||||||
| 3418 | bool ignored) { | ||||||||
| 3419 | // Evaluate the RHS first. | ||||||||
| 3420 | TryEmitResult result = tryEmitARCRetainScalarExpr(*this, e->getRHS()); | ||||||||
| 3421 | llvm::Value *value = result.getPointer(); | ||||||||
| 3422 | |||||||||
| 3423 | bool hasImmediateRetain = result.getInt(); | ||||||||
| 3424 | |||||||||
| 3425 | // If we didn't emit a retained object, and the l-value is of block | ||||||||
| 3426 | // type, then we need to emit the block-retain immediately in case | ||||||||
| 3427 | // it invalidates the l-value. | ||||||||
| 3428 | if (!hasImmediateRetain && e->getType()->isBlockPointerType()) { | ||||||||
| 3429 | value = EmitARCRetainBlock(value, /*mandatory*/ false); | ||||||||
| 3430 | hasImmediateRetain = true; | ||||||||
| 3431 | } | ||||||||
| 3432 | |||||||||
| 3433 | LValue lvalue = EmitLValue(e->getLHS()); | ||||||||
| 3434 | |||||||||
| 3435 | // If the RHS was emitted retained, expand this. | ||||||||
| 3436 | if (hasImmediateRetain) { | ||||||||
| 3437 | llvm::Value *oldValue = EmitLoadOfScalar(lvalue, SourceLocation()); | ||||||||
| 3438 | EmitStoreOfScalar(value, lvalue); | ||||||||
| 3439 | EmitARCRelease(oldValue, lvalue.isARCPreciseLifetime()); | ||||||||
| 3440 | } else { | ||||||||
| 3441 | value = EmitARCStoreStrong(lvalue, value, ignored); | ||||||||
| 3442 | } | ||||||||
| 3443 | |||||||||
| 3444 | return std::pair<LValue,llvm::Value*>(lvalue, value); | ||||||||
| 3445 | } | ||||||||
| 3446 | |||||||||
| 3447 | std::pair<LValue,llvm::Value*> | ||||||||
| 3448 | CodeGenFunction::EmitARCStoreAutoreleasing(const BinaryOperator *e) { | ||||||||
| 3449 | llvm::Value *value = EmitARCRetainAutoreleaseScalarExpr(e->getRHS()); | ||||||||
| 3450 | LValue lvalue = EmitLValue(e->getLHS()); | ||||||||
| 3451 | |||||||||
| 3452 | EmitStoreOfScalar(value, lvalue); | ||||||||
| 3453 | |||||||||
| 3454 | return std::pair<LValue,llvm::Value*>(lvalue, value); | ||||||||
| 3455 | } | ||||||||
| 3456 | |||||||||
| 3457 | void CodeGenFunction::EmitObjCAutoreleasePoolStmt( | ||||||||
| 3458 | const ObjCAutoreleasePoolStmt &ARPS) { | ||||||||
| 3459 | const Stmt *subStmt = ARPS.getSubStmt(); | ||||||||
| 3460 | const CompoundStmt &S = cast<CompoundStmt>(*subStmt); | ||||||||
| 3461 | |||||||||
| 3462 | CGDebugInfo *DI = getDebugInfo(); | ||||||||
| 3463 | if (DI) | ||||||||
| 3464 | DI->EmitLexicalBlockStart(Builder, S.getLBracLoc()); | ||||||||
| 3465 | |||||||||
| 3466 | // Keep track of the current cleanup stack depth. | ||||||||
| 3467 | RunCleanupsScope Scope(*this); | ||||||||
| 3468 | if (CGM.getLangOpts().ObjCRuntime.hasNativeARC()) { | ||||||||
| 3469 | llvm::Value *token = EmitObjCAutoreleasePoolPush(); | ||||||||
| 3470 | EHStack.pushCleanup<CallObjCAutoreleasePoolObject>(NormalCleanup, token); | ||||||||
| 3471 | } else { | ||||||||
| 3472 | llvm::Value *token = EmitObjCMRRAutoreleasePoolPush(); | ||||||||
| 3473 | EHStack.pushCleanup<CallObjCMRRAutoreleasePoolObject>(NormalCleanup, token); | ||||||||
| 3474 | } | ||||||||
| 3475 | |||||||||
| 3476 | for (const auto *I : S.body()) | ||||||||
| 3477 | EmitStmt(I); | ||||||||
| 3478 | |||||||||
| 3479 | if (DI) | ||||||||
| 3480 | DI->EmitLexicalBlockEnd(Builder, S.getRBracLoc()); | ||||||||
| 3481 | } | ||||||||
| 3482 | |||||||||
| 3483 | /// EmitExtendGCLifetime - Given a pointer to an Objective-C object, | ||||||||
| 3484 | /// make sure it survives garbage collection until this point. | ||||||||
| 3485 | void CodeGenFunction::EmitExtendGCLifetime(llvm::Value *object) { | ||||||||
| 3486 | // We just use an inline assembly. | ||||||||
| 3487 | llvm::FunctionType *extenderType | ||||||||
| 3488 | = llvm::FunctionType::get(VoidTy, VoidPtrTy, RequiredArgs::All); | ||||||||
| 3489 | llvm::InlineAsm *extender = llvm::InlineAsm::get(extenderType, | ||||||||
| 3490 | /* assembly */ "", | ||||||||
| 3491 | /* constraints */ "r", | ||||||||
| 3492 | /* side effects */ true); | ||||||||
| 3493 | |||||||||
| 3494 | object = Builder.CreateBitCast(object, VoidPtrTy); | ||||||||
| 3495 | EmitNounwindRuntimeCall(extender, object); | ||||||||
| 3496 | } | ||||||||
| 3497 | |||||||||
| 3498 | /// GenerateObjCAtomicSetterCopyHelperFunction - Given a c++ object type with | ||||||||
| 3499 | /// non-trivial copy assignment function, produce following helper function. | ||||||||
| 3500 | /// static void copyHelper(Ty *dest, const Ty *source) { *dest = *source; } | ||||||||
| 3501 | /// | ||||||||
| 3502 | llvm::Constant * | ||||||||
| 3503 | CodeGenFunction::GenerateObjCAtomicSetterCopyHelperFunction( | ||||||||
| 3504 | const ObjCPropertyImplDecl *PID) { | ||||||||
| 3505 | if (!getLangOpts().CPlusPlus || | ||||||||
| 3506 | !getLangOpts().ObjCRuntime.hasAtomicCopyHelper()) | ||||||||
| 3507 | return nullptr; | ||||||||
| 3508 | QualType Ty = PID->getPropertyIvarDecl()->getType(); | ||||||||
| 3509 | if (!Ty->isRecordType()) | ||||||||
| 3510 | return nullptr; | ||||||||
| 3511 | const ObjCPropertyDecl *PD = PID->getPropertyDecl(); | ||||||||
| 3512 | if ((!(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_atomic))) | ||||||||
| 3513 | return nullptr; | ||||||||
| 3514 | llvm::Constant *HelperFn = nullptr; | ||||||||
| 3515 | if (hasTrivialSetExpr(PID)) | ||||||||
| 3516 | return nullptr; | ||||||||
| 3517 | assert(PID->getSetterCXXAssignment() && "SetterCXXAssignment - null")((PID->getSetterCXXAssignment() && "SetterCXXAssignment - null" ) ? static_cast<void> (0) : __assert_fail ("PID->getSetterCXXAssignment() && \"SetterCXXAssignment - null\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 3517, __PRETTY_FUNCTION__)); | ||||||||
| 3518 | if ((HelperFn = CGM.getAtomicSetterHelperFnMap(Ty))) | ||||||||
| 3519 | return HelperFn; | ||||||||
| 3520 | |||||||||
| 3521 | ASTContext &C = getContext(); | ||||||||
| 3522 | IdentifierInfo *II | ||||||||
| 3523 | = &CGM.getContext().Idents.get("__assign_helper_atomic_property_"); | ||||||||
| 3524 | |||||||||
| 3525 | QualType ReturnTy = C.VoidTy; | ||||||||
| 3526 | QualType DestTy = C.getPointerType(Ty); | ||||||||
| 3527 | QualType SrcTy = Ty; | ||||||||
| 3528 | SrcTy.addConst(); | ||||||||
| 3529 | SrcTy = C.getPointerType(SrcTy); | ||||||||
| 3530 | |||||||||
| 3531 | SmallVector<QualType, 2> ArgTys; | ||||||||
| 3532 | ArgTys.push_back(DestTy); | ||||||||
| 3533 | ArgTys.push_back(SrcTy); | ||||||||
| 3534 | QualType FunctionTy = C.getFunctionType(ReturnTy, ArgTys, {}); | ||||||||
| 3535 | |||||||||
| 3536 | FunctionDecl *FD = FunctionDecl::Create( | ||||||||
| 3537 | C, C.getTranslationUnitDecl(), SourceLocation(), SourceLocation(), II, | ||||||||
| 3538 | FunctionTy, nullptr, SC_Static, false, false); | ||||||||
| 3539 | |||||||||
| 3540 | FunctionArgList args; | ||||||||
| 3541 | ImplicitParamDecl DstDecl(C, FD, SourceLocation(), /*Id=*/nullptr, DestTy, | ||||||||
| 3542 | ImplicitParamDecl::Other); | ||||||||
| 3543 | args.push_back(&DstDecl); | ||||||||
| 3544 | ImplicitParamDecl SrcDecl(C, FD, SourceLocation(), /*Id=*/nullptr, SrcTy, | ||||||||
| 3545 | ImplicitParamDecl::Other); | ||||||||
| 3546 | args.push_back(&SrcDecl); | ||||||||
| 3547 | |||||||||
| 3548 | const CGFunctionInfo &FI = | ||||||||
| 3549 | CGM.getTypes().arrangeBuiltinFunctionDeclaration(ReturnTy, args); | ||||||||
| 3550 | |||||||||
| 3551 | llvm::FunctionType *LTy = CGM.getTypes().GetFunctionType(FI); | ||||||||
| 3552 | |||||||||
| 3553 | llvm::Function *Fn = | ||||||||
| 3554 | llvm::Function::Create(LTy, llvm::GlobalValue::InternalLinkage, | ||||||||
| 3555 | "__assign_helper_atomic_property_", | ||||||||
| 3556 | &CGM.getModule()); | ||||||||
| 3557 | |||||||||
| 3558 | CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, FI); | ||||||||
| 3559 | |||||||||
| 3560 | StartFunction(FD, ReturnTy, Fn, FI, args); | ||||||||
| 3561 | |||||||||
| 3562 | DeclRefExpr DstExpr(getContext(), &DstDecl, false, DestTy, VK_RValue, | ||||||||
| 3563 | SourceLocation()); | ||||||||
| 3564 | UnaryOperator DST(&DstExpr, UO_Deref, DestTy->getPointeeType(), | ||||||||
| 3565 | VK_LValue, OK_Ordinary, SourceLocation(), false); | ||||||||
| 3566 | |||||||||
| 3567 | DeclRefExpr SrcExpr(getContext(), &SrcDecl, false, SrcTy, VK_RValue, | ||||||||
| 3568 | SourceLocation()); | ||||||||
| 3569 | UnaryOperator SRC(&SrcExpr, UO_Deref, SrcTy->getPointeeType(), | ||||||||
| 3570 | VK_LValue, OK_Ordinary, SourceLocation(), false); | ||||||||
| 3571 | |||||||||
| 3572 | Expr *Args[2] = { &DST, &SRC }; | ||||||||
| 3573 | CallExpr *CalleeExp = cast<CallExpr>(PID->getSetterCXXAssignment()); | ||||||||
| 3574 | CXXOperatorCallExpr *TheCall = CXXOperatorCallExpr::Create( | ||||||||
| 3575 | C, OO_Equal, CalleeExp->getCallee(), Args, DestTy->getPointeeType(), | ||||||||
| 3576 | VK_LValue, SourceLocation(), FPOptions()); | ||||||||
| 3577 | |||||||||
| 3578 | EmitStmt(TheCall); | ||||||||
| 3579 | |||||||||
| 3580 | FinishFunction(); | ||||||||
| 3581 | HelperFn = llvm::ConstantExpr::getBitCast(Fn, VoidPtrTy); | ||||||||
| 3582 | CGM.setAtomicSetterHelperFnMap(Ty, HelperFn); | ||||||||
| 3583 | return HelperFn; | ||||||||
| 3584 | } | ||||||||
| 3585 | |||||||||
| 3586 | llvm::Constant * | ||||||||
| 3587 | CodeGenFunction::GenerateObjCAtomicGetterCopyHelperFunction( | ||||||||
| 3588 | const ObjCPropertyImplDecl *PID) { | ||||||||
| 3589 | if (!getLangOpts().CPlusPlus || | ||||||||
| 3590 | !getLangOpts().ObjCRuntime.hasAtomicCopyHelper()) | ||||||||
| 3591 | return nullptr; | ||||||||
| 3592 | const ObjCPropertyDecl *PD = PID->getPropertyDecl(); | ||||||||
| 3593 | QualType Ty = PD->getType(); | ||||||||
| 3594 | if (!Ty->isRecordType()) | ||||||||
| 3595 | return nullptr; | ||||||||
| 3596 | if ((!(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_atomic))) | ||||||||
| 3597 | return nullptr; | ||||||||
| 3598 | llvm::Constant *HelperFn = nullptr; | ||||||||
| 3599 | if (hasTrivialGetExpr(PID)) | ||||||||
| 3600 | return nullptr; | ||||||||
| 3601 | assert(PID->getGetterCXXConstructor() && "getGetterCXXConstructor - null")((PID->getGetterCXXConstructor() && "getGetterCXXConstructor - null" ) ? static_cast<void> (0) : __assert_fail ("PID->getGetterCXXConstructor() && \"getGetterCXXConstructor - null\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 3601, __PRETTY_FUNCTION__)); | ||||||||
| 3602 | if ((HelperFn = CGM.getAtomicGetterHelperFnMap(Ty))) | ||||||||
| 3603 | return HelperFn; | ||||||||
| 3604 | |||||||||
| 3605 | ASTContext &C = getContext(); | ||||||||
| 3606 | IdentifierInfo *II = | ||||||||
| 3607 | &CGM.getContext().Idents.get("__copy_helper_atomic_property_"); | ||||||||
| 3608 | |||||||||
| 3609 | QualType ReturnTy = C.VoidTy; | ||||||||
| 3610 | QualType DestTy = C.getPointerType(Ty); | ||||||||
| 3611 | QualType SrcTy = Ty; | ||||||||
| 3612 | SrcTy.addConst(); | ||||||||
| 3613 | SrcTy = C.getPointerType(SrcTy); | ||||||||
| 3614 | |||||||||
| 3615 | SmallVector<QualType, 2> ArgTys; | ||||||||
| 3616 | ArgTys.push_back(DestTy); | ||||||||
| 3617 | ArgTys.push_back(SrcTy); | ||||||||
| 3618 | QualType FunctionTy = C.getFunctionType(ReturnTy, ArgTys, {}); | ||||||||
| 3619 | |||||||||
| 3620 | FunctionDecl *FD = FunctionDecl::Create( | ||||||||
| 3621 | C, C.getTranslationUnitDecl(), SourceLocation(), SourceLocation(), II, | ||||||||
| 3622 | FunctionTy, nullptr, SC_Static, false, false); | ||||||||
| 3623 | |||||||||
| 3624 | FunctionArgList args; | ||||||||
| 3625 | ImplicitParamDecl DstDecl(C, FD, SourceLocation(), /*Id=*/nullptr, DestTy, | ||||||||
| 3626 | ImplicitParamDecl::Other); | ||||||||
| 3627 | args.push_back(&DstDecl); | ||||||||
| 3628 | ImplicitParamDecl SrcDecl(C, FD, SourceLocation(), /*Id=*/nullptr, SrcTy, | ||||||||
| 3629 | ImplicitParamDecl::Other); | ||||||||
| 3630 | args.push_back(&SrcDecl); | ||||||||
| 3631 | |||||||||
| 3632 | const CGFunctionInfo &FI = | ||||||||
| 3633 | CGM.getTypes().arrangeBuiltinFunctionDeclaration(ReturnTy, args); | ||||||||
| 3634 | |||||||||
| 3635 | llvm::FunctionType *LTy = CGM.getTypes().GetFunctionType(FI); | ||||||||
| 3636 | |||||||||
| 3637 | llvm::Function *Fn = llvm::Function::Create( | ||||||||
| 3638 | LTy, llvm::GlobalValue::InternalLinkage, "__copy_helper_atomic_property_", | ||||||||
| 3639 | &CGM.getModule()); | ||||||||
| 3640 | |||||||||
| 3641 | CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, FI); | ||||||||
| 3642 | |||||||||
| 3643 | StartFunction(FD, ReturnTy, Fn, FI, args); | ||||||||
| 3644 | |||||||||
| 3645 | DeclRefExpr SrcExpr(getContext(), &SrcDecl, false, SrcTy, VK_RValue, | ||||||||
| 3646 | SourceLocation()); | ||||||||
| 3647 | |||||||||
| 3648 | UnaryOperator SRC(&SrcExpr, UO_Deref, SrcTy->getPointeeType(), | ||||||||
| 3649 | VK_LValue, OK_Ordinary, SourceLocation(), false); | ||||||||
| 3650 | |||||||||
| 3651 | CXXConstructExpr *CXXConstExpr = | ||||||||
| 3652 | cast<CXXConstructExpr>(PID->getGetterCXXConstructor()); | ||||||||
| 3653 | |||||||||
| 3654 | SmallVector<Expr*, 4> ConstructorArgs; | ||||||||
| 3655 | ConstructorArgs.push_back(&SRC); | ||||||||
| 3656 | ConstructorArgs.append(std::next(CXXConstExpr->arg_begin()), | ||||||||
| 3657 | CXXConstExpr->arg_end()); | ||||||||
| 3658 | |||||||||
| 3659 | CXXConstructExpr *TheCXXConstructExpr = | ||||||||
| 3660 | CXXConstructExpr::Create(C, Ty, SourceLocation(), | ||||||||
| 3661 | CXXConstExpr->getConstructor(), | ||||||||
| 3662 | CXXConstExpr->isElidable(), | ||||||||
| 3663 | ConstructorArgs, | ||||||||
| 3664 | CXXConstExpr->hadMultipleCandidates(), | ||||||||
| 3665 | CXXConstExpr->isListInitialization(), | ||||||||
| 3666 | CXXConstExpr->isStdInitListInitialization(), | ||||||||
| 3667 | CXXConstExpr->requiresZeroInitialization(), | ||||||||
| 3668 | CXXConstExpr->getConstructionKind(), | ||||||||
| 3669 | SourceRange()); | ||||||||
| 3670 | |||||||||
| 3671 | DeclRefExpr DstExpr(getContext(), &DstDecl, false, DestTy, VK_RValue, | ||||||||
| 3672 | SourceLocation()); | ||||||||
| 3673 | |||||||||
| 3674 | RValue DV = EmitAnyExpr(&DstExpr); | ||||||||
| 3675 | CharUnits Alignment | ||||||||
| 3676 | = getContext().getTypeAlignInChars(TheCXXConstructExpr->getType()); | ||||||||
| 3677 | EmitAggExpr(TheCXXConstructExpr, | ||||||||
| 3678 | AggValueSlot::forAddr(Address(DV.getScalarVal(), Alignment), | ||||||||
| 3679 | Qualifiers(), | ||||||||
| 3680 | AggValueSlot::IsDestructed, | ||||||||
| 3681 | AggValueSlot::DoesNotNeedGCBarriers, | ||||||||
| 3682 | AggValueSlot::IsNotAliased, | ||||||||
| 3683 | AggValueSlot::DoesNotOverlap)); | ||||||||
| 3684 | |||||||||
| 3685 | FinishFunction(); | ||||||||
| 3686 | HelperFn = llvm::ConstantExpr::getBitCast(Fn, VoidPtrTy); | ||||||||
| 3687 | CGM.setAtomicGetterHelperFnMap(Ty, HelperFn); | ||||||||
| 3688 | return HelperFn; | ||||||||
| 3689 | } | ||||||||
| 3690 | |||||||||
| 3691 | llvm::Value * | ||||||||
| 3692 | CodeGenFunction::EmitBlockCopyAndAutorelease(llvm::Value *Block, QualType Ty) { | ||||||||
| 3693 | // Get selectors for retain/autorelease. | ||||||||
| 3694 | IdentifierInfo *CopyID = &getContext().Idents.get("copy"); | ||||||||
| 3695 | Selector CopySelector = | ||||||||
| 3696 | getContext().Selectors.getNullarySelector(CopyID); | ||||||||
| 3697 | IdentifierInfo *AutoreleaseID = &getContext().Idents.get("autorelease"); | ||||||||
| 3698 | Selector AutoreleaseSelector = | ||||||||
| 3699 | getContext().Selectors.getNullarySelector(AutoreleaseID); | ||||||||
| 3700 | |||||||||
| 3701 | // Emit calls to retain/autorelease. | ||||||||
| 3702 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); | ||||||||
| 3703 | llvm::Value *Val = Block; | ||||||||
| 3704 | RValue Result; | ||||||||
| 3705 | Result = Runtime.GenerateMessageSend(*this, ReturnValueSlot(), | ||||||||
| 3706 | Ty, CopySelector, | ||||||||
| 3707 | Val, CallArgList(), nullptr, nullptr); | ||||||||
| 3708 | Val = Result.getScalarVal(); | ||||||||
| 3709 | Result = Runtime.GenerateMessageSend(*this, ReturnValueSlot(), | ||||||||
| 3710 | Ty, AutoreleaseSelector, | ||||||||
| 3711 | Val, CallArgList(), nullptr, nullptr); | ||||||||
| 3712 | Val = Result.getScalarVal(); | ||||||||
| 3713 | return Val; | ||||||||
| 3714 | } | ||||||||
| 3715 | |||||||||
| 3716 | llvm::Value * | ||||||||
| 3717 | CodeGenFunction::EmitBuiltinAvailable(ArrayRef<llvm::Value *> Args) { | ||||||||
| 3718 | assert(Args.size() == 3 && "Expected 3 argument here!")((Args.size() == 3 && "Expected 3 argument here!") ? static_cast <void> (0) : __assert_fail ("Args.size() == 3 && \"Expected 3 argument here!\"" , "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/CodeGen/CGObjC.cpp" , 3718, __PRETTY_FUNCTION__)); | ||||||||
| 3719 | |||||||||
| 3720 | if (!CGM.IsOSVersionAtLeastFn) { | ||||||||
| 3721 | llvm::FunctionType *FTy = | ||||||||
| 3722 | llvm::FunctionType::get(Int32Ty, {Int32Ty, Int32Ty, Int32Ty}, false); | ||||||||
| 3723 | CGM.IsOSVersionAtLeastFn = | ||||||||
| 3724 | CGM.CreateRuntimeFunction(FTy, "__isOSVersionAtLeast"); | ||||||||
| 3725 | } | ||||||||
| 3726 | |||||||||
| 3727 | llvm::Value *CallRes = | ||||||||
| 3728 | EmitNounwindRuntimeCall(CGM.IsOSVersionAtLeastFn, Args); | ||||||||
| 3729 | |||||||||
| 3730 | return Builder.CreateICmpNE(CallRes, llvm::Constant::getNullValue(Int32Ty)); | ||||||||
| 3731 | } | ||||||||
| 3732 | |||||||||
| 3733 | void CodeGenModule::emitAtAvailableLinkGuard() { | ||||||||
| 3734 | if (!IsOSVersionAtLeastFn) | ||||||||
| 3735 | return; | ||||||||
| 3736 | // @available requires CoreFoundation only on Darwin. | ||||||||
| 3737 | if (!Target.getTriple().isOSDarwin()) | ||||||||
| 3738 | return; | ||||||||
| 3739 | // Add -framework CoreFoundation to the linker commands. We still want to | ||||||||
| 3740 | // emit the core foundation reference down below because otherwise if | ||||||||
| 3741 | // CoreFoundation is not used in the code, the linker won't link the | ||||||||
| 3742 | // framework. | ||||||||
| 3743 | auto &Context = getLLVMContext(); | ||||||||
| 3744 | llvm::Metadata *Args[2] = {llvm::MDString::get(Context, "-framework"), | ||||||||
| 3745 | llvm::MDString::get(Context, "CoreFoundation")}; | ||||||||
| 3746 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(Context, Args)); | ||||||||
| 3747 | // Emit a reference to a symbol from CoreFoundation to ensure that | ||||||||
| 3748 | // CoreFoundation is linked into the final binary. | ||||||||
| 3749 | llvm::FunctionType *FTy = | ||||||||
| 3750 | llvm::FunctionType::get(Int32Ty, {VoidPtrTy}, false); | ||||||||
| 3751 | llvm::FunctionCallee CFFunc = | ||||||||
| 3752 | CreateRuntimeFunction(FTy, "CFBundleGetVersionNumber"); | ||||||||
| 3753 | |||||||||
| 3754 | llvm::FunctionType *CheckFTy = llvm::FunctionType::get(VoidTy, {}, false); | ||||||||
| 3755 | llvm::FunctionCallee CFLinkCheckFuncRef = CreateRuntimeFunction( | ||||||||
| 3756 | CheckFTy, "__clang_at_available_requires_core_foundation_framework", | ||||||||
| 3757 | llvm::AttributeList(), /*Local=*/true); | ||||||||
| 3758 | llvm::Function *CFLinkCheckFunc = | ||||||||
| 3759 | cast<llvm::Function>(CFLinkCheckFuncRef.getCallee()->stripPointerCasts()); | ||||||||
| 3760 | if (CFLinkCheckFunc->empty()) { | ||||||||
| 3761 | CFLinkCheckFunc->setLinkage(llvm::GlobalValue::LinkOnceAnyLinkage); | ||||||||
| 3762 | CFLinkCheckFunc->setVisibility(llvm::GlobalValue::HiddenVisibility); | ||||||||
| 3763 | CodeGenFunction CGF(*this); | ||||||||
| 3764 | CGF.Builder.SetInsertPoint(CGF.createBasicBlock("", CFLinkCheckFunc)); | ||||||||
| 3765 | CGF.EmitNounwindRuntimeCall(CFFunc, | ||||||||
| 3766 | llvm::Constant::getNullValue(VoidPtrTy)); | ||||||||
| 3767 | CGF.Builder.CreateUnreachable(); | ||||||||
| 3768 | addCompilerUsedGlobal(CFLinkCheckFunc); | ||||||||
| 3769 | } | ||||||||
| 3770 | } | ||||||||
| 3771 | |||||||||
| 3772 | CGObjCRuntime::~CGObjCRuntime() {} |
| 1 | //===- ObjCRuntime.h - Objective-C Runtime Configuration --------*- C++ -*-===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | /// \file |
| 10 | /// Defines types useful for describing an Objective-C runtime. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef LLVM_CLANG_BASIC_OBJCRUNTIME_H |
| 15 | #define LLVM_CLANG_BASIC_OBJCRUNTIME_H |
| 16 | |
| 17 | #include "clang/Basic/LLVM.h" |
| 18 | #include "llvm/ADT/StringRef.h" |
| 19 | #include "llvm/ADT/Triple.h" |
| 20 | #include "llvm/Support/ErrorHandling.h" |
| 21 | #include "llvm/Support/VersionTuple.h" |
| 22 | #include <string> |
| 23 | |
| 24 | namespace clang { |
| 25 | |
| 26 | /// The basic abstraction for the target Objective-C runtime. |
| 27 | class ObjCRuntime { |
| 28 | public: |
| 29 | /// The basic Objective-C runtimes that we know about. |
| 30 | enum Kind { |
| 31 | /// 'macosx' is the Apple-provided NeXT-derived runtime on Mac OS |
| 32 | /// X platforms that use the non-fragile ABI; the version is a |
| 33 | /// release of that OS. |
| 34 | MacOSX, |
| 35 | |
| 36 | /// 'macosx-fragile' is the Apple-provided NeXT-derived runtime on |
| 37 | /// Mac OS X platforms that use the fragile ABI; the version is a |
| 38 | /// release of that OS. |
| 39 | FragileMacOSX, |
| 40 | |
| 41 | /// 'ios' is the Apple-provided NeXT-derived runtime on iOS or the iOS |
| 42 | /// simulator; it is always non-fragile. The version is a release |
| 43 | /// version of iOS. |
| 44 | iOS, |
| 45 | |
| 46 | /// 'watchos' is a variant of iOS for Apple's watchOS. The version |
| 47 | /// is a release version of watchOS. |
| 48 | WatchOS, |
| 49 | |
| 50 | /// 'gcc' is the Objective-C runtime shipped with GCC, implementing a |
| 51 | /// fragile Objective-C ABI |
| 52 | GCC, |
| 53 | |
| 54 | /// 'gnustep' is the modern non-fragile GNUstep runtime. |
| 55 | GNUstep, |
| 56 | |
| 57 | /// 'objfw' is the Objective-C runtime included in ObjFW |
| 58 | ObjFW |
| 59 | }; |
| 60 | |
| 61 | private: |
| 62 | Kind TheKind = MacOSX; |
| 63 | VersionTuple Version; |
| 64 | |
| 65 | public: |
| 66 | /// A bogus initialization of the runtime. |
| 67 | ObjCRuntime() = default; |
| 68 | ObjCRuntime(Kind kind, const VersionTuple &version) |
| 69 | : TheKind(kind), Version(version) {} |
| 70 | |
| 71 | void set(Kind kind, VersionTuple version) { |
| 72 | TheKind = kind; |
| 73 | Version = version; |
| 74 | } |
| 75 | |
| 76 | Kind getKind() const { return TheKind; } |
| 77 | const VersionTuple &getVersion() const { return Version; } |
| 78 | |
| 79 | /// Does this runtime follow the set of implied behaviors for a |
| 80 | /// "non-fragile" ABI? |
| 81 | bool isNonFragile() const { |
| 82 | switch (getKind()) { |
| 83 | case FragileMacOSX: return false; |
| 84 | case GCC: return false; |
| 85 | case MacOSX: return true; |
| 86 | case GNUstep: return true; |
| 87 | case ObjFW: return true; |
| 88 | case iOS: return true; |
| 89 | case WatchOS: return true; |
| 90 | } |
| 91 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 91); |
| 92 | } |
| 93 | |
| 94 | /// The inverse of isNonFragile(): does this runtime follow the set of |
| 95 | /// implied behaviors for a "fragile" ABI? |
| 96 | bool isFragile() const { return !isNonFragile(); } |
| 97 | |
| 98 | /// The default dispatch mechanism to use for the specified architecture |
| 99 | bool isLegacyDispatchDefaultForArch(llvm::Triple::ArchType Arch) { |
| 100 | // The GNUstep runtime uses a newer dispatch method by default from |
| 101 | // version 1.6 onwards |
| 102 | if (getKind() == GNUstep && getVersion() >= VersionTuple(1, 6)) { |
| 103 | if (Arch == llvm::Triple::arm || |
| 104 | Arch == llvm::Triple::x86 || |
| 105 | Arch == llvm::Triple::x86_64) |
| 106 | return false; |
| 107 | } |
| 108 | else if ((getKind() == MacOSX) && isNonFragile() && |
| 109 | (getVersion() >= VersionTuple(10, 0)) && |
| 110 | (getVersion() < VersionTuple(10, 6))) |
| 111 | return Arch != llvm::Triple::x86_64; |
| 112 | // Except for deployment target of 10.5 or less, |
| 113 | // Mac runtimes use legacy dispatch everywhere now. |
| 114 | return true; |
| 115 | } |
| 116 | |
| 117 | /// Is this runtime basically of the GNU family of runtimes? |
| 118 | bool isGNUFamily() const { |
| 119 | switch (getKind()) { |
| 120 | case FragileMacOSX: |
| 121 | case MacOSX: |
| 122 | case iOS: |
| 123 | case WatchOS: |
| 124 | return false; |
| 125 | case GCC: |
| 126 | case GNUstep: |
| 127 | case ObjFW: |
| 128 | return true; |
| 129 | } |
| 130 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 130); |
| 131 | } |
| 132 | |
| 133 | /// Is this runtime basically of the NeXT family of runtimes? |
| 134 | bool isNeXTFamily() const { |
| 135 | // For now, this is just the inverse of isGNUFamily(), but that's |
| 136 | // not inherently true. |
| 137 | return !isGNUFamily(); |
| 138 | } |
| 139 | |
| 140 | /// Does this runtime allow ARC at all? |
| 141 | bool allowsARC() const { |
| 142 | switch (getKind()) { |
| 143 | case FragileMacOSX: |
| 144 | // No stub library for the fragile runtime. |
| 145 | return getVersion() >= VersionTuple(10, 7); |
| 146 | case MacOSX: return true; |
| 147 | case iOS: return true; |
| 148 | case WatchOS: return true; |
| 149 | case GCC: return false; |
| 150 | case GNUstep: return true; |
| 151 | case ObjFW: return true; |
| 152 | } |
| 153 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 153); |
| 154 | } |
| 155 | |
| 156 | /// Does this runtime natively provide the ARC entrypoints? |
| 157 | /// |
| 158 | /// ARC cannot be directly supported on a platform that does not provide |
| 159 | /// these entrypoints, although it may be supportable via a stub |
| 160 | /// library. |
| 161 | bool hasNativeARC() const { |
| 162 | switch (getKind()) { |
| 163 | case FragileMacOSX: return getVersion() >= VersionTuple(10, 7); |
| 164 | case MacOSX: return getVersion() >= VersionTuple(10, 7); |
| 165 | case iOS: return getVersion() >= VersionTuple(5); |
| 166 | case WatchOS: return true; |
| 167 | |
| 168 | case GCC: return false; |
| 169 | case GNUstep: return getVersion() >= VersionTuple(1, 6); |
| 170 | case ObjFW: return true; |
| 171 | } |
| 172 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 172); |
| 173 | } |
| 174 | |
| 175 | /// Does this runtime provide ARC entrypoints that are likely to be faster |
| 176 | /// than an ordinary message send of the appropriate selector? |
| 177 | /// |
| 178 | /// The ARC entrypoints are guaranteed to be equivalent to just sending the |
| 179 | /// corresponding message. If the entrypoint is implemented naively as just a |
| 180 | /// message send, using it is a trade-off: it sacrifices a few cycles of |
| 181 | /// overhead to save a small amount of code. However, it's possible for |
| 182 | /// runtimes to detect and special-case classes that use "standard" |
| 183 | /// retain/release behavior; if that's dynamically a large proportion of all |
| 184 | /// retained objects, using the entrypoint will also be faster than using a |
| 185 | /// message send. |
| 186 | /// |
| 187 | /// When this method returns true, Clang will turn non-super message sends of |
| 188 | /// certain selectors into calls to the correspond entrypoint: |
| 189 | /// retain => objc_retain |
| 190 | /// release => objc_release |
| 191 | /// autorelease => objc_autorelease |
| 192 | bool shouldUseARCFunctionsForRetainRelease() const { |
| 193 | switch (getKind()) { |
| 194 | case FragileMacOSX: |
| 195 | return false; |
| 196 | case MacOSX: |
| 197 | return getVersion() >= VersionTuple(10, 10); |
| 198 | case iOS: |
| 199 | return getVersion() >= VersionTuple(8); |
| 200 | case WatchOS: |
| 201 | return true; |
| 202 | case GCC: |
| 203 | return false; |
| 204 | case GNUstep: |
| 205 | return false; |
| 206 | case ObjFW: |
| 207 | return false; |
| 208 | } |
| 209 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 209); |
| 210 | } |
| 211 | |
| 212 | /// Does this runtime provide entrypoints that are likely to be faster |
| 213 | /// than an ordinary message send of the "alloc" selector? |
| 214 | /// |
| 215 | /// The "alloc" entrypoint is guaranteed to be equivalent to just sending the |
| 216 | /// corresponding message. If the entrypoint is implemented naively as just a |
| 217 | /// message send, using it is a trade-off: it sacrifices a few cycles of |
| 218 | /// overhead to save a small amount of code. However, it's possible for |
| 219 | /// runtimes to detect and special-case classes that use "standard" |
| 220 | /// alloc behavior; if that's dynamically a large proportion of all |
| 221 | /// objects, using the entrypoint will also be faster than using a message |
| 222 | /// send. |
| 223 | /// |
| 224 | /// When this method returns true, Clang will turn non-super message sends of |
| 225 | /// certain selectors into calls to the corresponding entrypoint: |
| 226 | /// alloc => objc_alloc |
| 227 | /// allocWithZone:nil => objc_allocWithZone |
| 228 | bool shouldUseRuntimeFunctionsForAlloc() const { |
| 229 | switch (getKind()) { |
| 230 | case FragileMacOSX: |
| 231 | return false; |
| 232 | case MacOSX: |
| 233 | return getVersion() >= VersionTuple(10, 10); |
| 234 | case iOS: |
| 235 | return getVersion() >= VersionTuple(8); |
| 236 | case WatchOS: |
| 237 | return true; |
| 238 | |
| 239 | case GCC: |
| 240 | return false; |
| 241 | case GNUstep: |
| 242 | return false; |
| 243 | case ObjFW: |
| 244 | return false; |
| 245 | } |
| 246 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 246); |
| 247 | } |
| 248 | |
| 249 | /// Does this runtime provide the objc_alloc_init entrypoint? This can apply |
| 250 | /// the same optimization as objc_alloc, but also sends an -init message, |
| 251 | /// reducing code size on the caller. |
| 252 | bool shouldUseRuntimeFunctionForCombinedAllocInit() const { |
| 253 | switch (getKind()) { |
| 254 | case MacOSX: |
| 255 | return getVersion() >= VersionTuple(10, 14, 4); |
| 256 | case iOS: |
| 257 | return getVersion() >= VersionTuple(12, 2); |
| 258 | case WatchOS: |
| 259 | return getVersion() >= VersionTuple(5, 2); |
| 260 | default: |
| 261 | return false; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | /// Does this runtime supports optimized setter entrypoints? |
| 266 | bool hasOptimizedSetter() const { |
| 267 | switch (getKind()) { |
| 268 | case MacOSX: |
| 269 | return getVersion() >= VersionTuple(10, 8); |
| 270 | case iOS: |
| 271 | return (getVersion() >= VersionTuple(6)); |
| 272 | case WatchOS: |
| 273 | return true; |
| 274 | case GNUstep: |
| 275 | return getVersion() >= VersionTuple(1, 7); |
| 276 | default: |
| 277 | return false; |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | /// Does this runtime allow the use of __weak? |
| 282 | bool allowsWeak() const { |
| 283 | return hasNativeWeak(); |
| 284 | } |
| 285 | |
| 286 | /// Does this runtime natively provide ARC-compliant 'weak' |
| 287 | /// entrypoints? |
| 288 | bool hasNativeWeak() const { |
| 289 | // Right now, this is always equivalent to whether the runtime |
| 290 | // natively supports ARC decision. |
| 291 | return hasNativeARC(); |
| 292 | } |
| 293 | |
| 294 | /// Does this runtime directly support the subscripting methods? |
| 295 | /// |
| 296 | /// This is really a property of the library, not the runtime. |
| 297 | bool hasSubscripting() const { |
| 298 | switch (getKind()) { |
| 299 | case FragileMacOSX: return false; |
| 300 | case MacOSX: return getVersion() >= VersionTuple(10, 11); |
| 301 | case iOS: return getVersion() >= VersionTuple(9); |
| 302 | case WatchOS: return true; |
| 303 | |
| 304 | // This is really a lie, because some implementations and versions |
| 305 | // of the runtime do not support ARC. Probably -fgnu-runtime |
| 306 | // should imply a "maximal" runtime or something? |
| 307 | case GCC: return true; |
| 308 | case GNUstep: return true; |
| 309 | case ObjFW: return true; |
| 310 | } |
| 311 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 311); |
| 312 | } |
| 313 | |
| 314 | /// Does this runtime allow sizeof or alignof on object types? |
| 315 | bool allowsSizeofAlignof() const { |
| 316 | return isFragile(); |
| 317 | } |
| 318 | |
| 319 | /// Does this runtime allow pointer arithmetic on objects? |
| 320 | /// |
| 321 | /// This covers +, -, ++, --, and (if isSubscriptPointerArithmetic() |
| 322 | /// yields true) []. |
| 323 | bool allowsPointerArithmetic() const { |
| 324 | switch (getKind()) { |
| 325 | case FragileMacOSX: |
| 326 | case GCC: |
| 327 | return true; |
| 328 | case MacOSX: |
| 329 | case iOS: |
| 330 | case WatchOS: |
| 331 | case GNUstep: |
| 332 | case ObjFW: |
| 333 | return false; |
| 334 | } |
| 335 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 335); |
| 336 | } |
| 337 | |
| 338 | /// Is subscripting pointer arithmetic? |
| 339 | bool isSubscriptPointerArithmetic() const { |
| 340 | return allowsPointerArithmetic(); |
| 341 | } |
| 342 | |
| 343 | /// Does this runtime provide an objc_terminate function? |
| 344 | /// |
| 345 | /// This is used in handlers for exceptions during the unwind process; |
| 346 | /// without it, abort() must be used in pure ObjC files. |
| 347 | bool hasTerminate() const { |
| 348 | switch (getKind()) { |
| 349 | case FragileMacOSX: return getVersion() >= VersionTuple(10, 8); |
| 350 | case MacOSX: return getVersion() >= VersionTuple(10, 8); |
| 351 | case iOS: return getVersion() >= VersionTuple(5); |
| 352 | case WatchOS: return true; |
| 353 | case GCC: return false; |
| 354 | case GNUstep: return false; |
| 355 | case ObjFW: return false; |
| 356 | } |
| 357 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 357); |
| 358 | } |
| 359 | |
| 360 | /// Does this runtime support weakly importing classes? |
| 361 | bool hasWeakClassImport() const { |
| 362 | switch (getKind()) { |
| 363 | case MacOSX: return true; |
| 364 | case iOS: return true; |
| 365 | case WatchOS: return true; |
| 366 | case FragileMacOSX: return false; |
| 367 | case GCC: return true; |
| 368 | case GNUstep: return true; |
| 369 | case ObjFW: return true; |
| 370 | } |
| 371 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 371); |
| 372 | } |
| 373 | |
| 374 | /// Does this runtime use zero-cost exceptions? |
| 375 | bool hasUnwindExceptions() const { |
| 376 | switch (getKind()) { |
| 377 | case MacOSX: return true; |
| 378 | case iOS: return true; |
| 379 | case WatchOS: return true; |
| 380 | case FragileMacOSX: return false; |
| 381 | case GCC: return true; |
| 382 | case GNUstep: return true; |
| 383 | case ObjFW: return true; |
| 384 | } |
| 385 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 385); |
| 386 | } |
| 387 | |
| 388 | bool hasAtomicCopyHelper() const { |
| 389 | switch (getKind()) { |
| 390 | case FragileMacOSX: |
| 391 | case MacOSX: |
| 392 | case iOS: |
| 393 | case WatchOS: |
| 394 | return true; |
| 395 | case GNUstep: |
| 396 | return getVersion() >= VersionTuple(1, 7); |
| 397 | default: return false; |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | /// Is objc_unsafeClaimAutoreleasedReturnValue available? |
| 402 | bool hasARCUnsafeClaimAutoreleasedReturnValue() const { |
| 403 | switch (getKind()) { |
| 404 | case MacOSX: |
| 405 | case FragileMacOSX: |
| 406 | return getVersion() >= VersionTuple(10, 11); |
| 407 | case iOS: |
| 408 | return getVersion() >= VersionTuple(9); |
| 409 | case WatchOS: |
| 410 | return getVersion() >= VersionTuple(2); |
| 411 | case GNUstep: |
| 412 | return false; |
| 413 | default: |
| 414 | return false; |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | /// Are the empty collection symbols available? |
| 419 | bool hasEmptyCollections() const { |
| 420 | switch (getKind()) { |
| 421 | default: |
| 422 | return false; |
| 423 | case MacOSX: |
| 424 | return getVersion() >= VersionTuple(10, 11); |
| 425 | case iOS: |
| 426 | return getVersion() >= VersionTuple(9); |
| 427 | case WatchOS: |
| 428 | return getVersion() >= VersionTuple(2); |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | /// Returns true if this Objective-C runtime supports Objective-C class |
| 433 | /// stubs. |
| 434 | bool allowsClassStubs() const { |
| 435 | switch (getKind()) { |
| 436 | case FragileMacOSX: |
| 437 | case GCC: |
| 438 | case GNUstep: |
| 439 | case ObjFW: |
| 440 | return false; |
| 441 | case MacOSX: |
| 442 | case iOS: |
| 443 | case WatchOS: |
| 444 | return true; |
| 445 | } |
| 446 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 446); |
| 447 | } |
| 448 | |
| 449 | /// Does this runtime supports direct dispatch |
| 450 | bool allowsDirectDispatch() const { |
| 451 | switch (getKind()) { |
| 452 | case FragileMacOSX: return false; |
| 453 | case MacOSX: return true; |
| 454 | case iOS: return true; |
| 455 | case WatchOS: return true; |
| 456 | case GCC: return false; |
| 457 | case GNUstep: return false; |
| 458 | case ObjFW: return false; |
| 459 | } |
| 460 | llvm_unreachable("bad kind")::llvm::llvm_unreachable_internal("bad kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include/clang/Basic/ObjCRuntime.h" , 460); |
| 461 | } |
| 462 | |
| 463 | /// Try to parse an Objective-C runtime specification from the given |
| 464 | /// string. |
| 465 | /// |
| 466 | /// \return true on error. |
| 467 | bool tryParse(StringRef input); |
| 468 | |
| 469 | std::string getAsString() const; |
| 470 | |
| 471 | friend bool operator==(const ObjCRuntime &left, const ObjCRuntime &right) { |
| 472 | return left.getKind() == right.getKind() && |
| 473 | left.getVersion() == right.getVersion(); |
| 474 | } |
| 475 | |
| 476 | friend bool operator!=(const ObjCRuntime &left, const ObjCRuntime &right) { |
| 477 | return !(left == right); |
| 478 | } |
| 479 | }; |
| 480 | |
| 481 | raw_ostream &operator<<(raw_ostream &out, const ObjCRuntime &value); |
| 482 | |
| 483 | } // namespace clang |
| 484 | |
| 485 | #endif // LLVM_CLANG_BASIC_OBJCRUNTIME_H |
| 1 | //===- VersionTuple.h - Version Number Handling -----------------*- C++ -*-===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | /// |
| 9 | /// \file |
| 10 | /// Defines the llvm::VersionTuple class, which represents a version in |
| 11 | /// the form major[.minor[.subminor]]. |
| 12 | /// |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | #ifndef LLVM_SUPPORT_VERSIONTUPLE_H |
| 15 | #define LLVM_SUPPORT_VERSIONTUPLE_H |
| 16 | |
| 17 | #include "llvm/ADT/Optional.h" |
| 18 | #include "llvm/ADT/StringRef.h" |
| 19 | #include "llvm/Support/raw_ostream.h" |
| 20 | #include <string> |
| 21 | #include <tuple> |
| 22 | |
| 23 | namespace llvm { |
| 24 | |
| 25 | /// Represents a version number in the form major[.minor[.subminor[.build]]]. |
| 26 | class VersionTuple { |
| 27 | unsigned Major : 32; |
| 28 | |
| 29 | unsigned Minor : 31; |
| 30 | unsigned HasMinor : 1; |
| 31 | |
| 32 | unsigned Subminor : 31; |
| 33 | unsigned HasSubminor : 1; |
| 34 | |
| 35 | unsigned Build : 31; |
| 36 | unsigned HasBuild : 1; |
| 37 | |
| 38 | public: |
| 39 | VersionTuple() |
| 40 | : Major(0), Minor(0), HasMinor(false), Subminor(0), HasSubminor(false), |
| 41 | Build(0), HasBuild(false) {} |
| 42 | |
| 43 | explicit VersionTuple(unsigned Major) |
| 44 | : Major(Major), Minor(0), HasMinor(false), Subminor(0), |
| 45 | HasSubminor(false), Build(0), HasBuild(false) {} |
| 46 | |
| 47 | explicit VersionTuple(unsigned Major, unsigned Minor) |
| 48 | : Major(Major), Minor(Minor), HasMinor(true), Subminor(0), |
| 49 | HasSubminor(false), Build(0), HasBuild(false) {} |
| 50 | |
| 51 | explicit VersionTuple(unsigned Major, unsigned Minor, unsigned Subminor) |
| 52 | : Major(Major), Minor(Minor), HasMinor(true), Subminor(Subminor), |
| 53 | HasSubminor(true), Build(0), HasBuild(false) {} |
| 54 | |
| 55 | explicit VersionTuple(unsigned Major, unsigned Minor, unsigned Subminor, |
| 56 | unsigned Build) |
| 57 | : Major(Major), Minor(Minor), HasMinor(true), Subminor(Subminor), |
| 58 | HasSubminor(true), Build(Build), HasBuild(true) {} |
| 59 | |
| 60 | /// Determine whether this version information is empty |
| 61 | /// (e.g., all version components are zero). |
| 62 | bool empty() const { |
| 63 | return Major == 0 && Minor == 0 && Subminor == 0 && Build == 0; |
| 64 | } |
| 65 | |
| 66 | /// Retrieve the major version number. |
| 67 | unsigned getMajor() const { return Major; } |
| 68 | |
| 69 | /// Retrieve the minor version number, if provided. |
| 70 | Optional<unsigned> getMinor() const { |
| 71 | if (!HasMinor) |
| 72 | return None; |
| 73 | return Minor; |
| 74 | } |
| 75 | |
| 76 | /// Retrieve the subminor version number, if provided. |
| 77 | Optional<unsigned> getSubminor() const { |
| 78 | if (!HasSubminor) |
| 79 | return None; |
| 80 | return Subminor; |
| 81 | } |
| 82 | |
| 83 | /// Retrieve the build version number, if provided. |
| 84 | Optional<unsigned> getBuild() const { |
| 85 | if (!HasBuild) |
| 86 | return None; |
| 87 | return Build; |
| 88 | } |
| 89 | |
| 90 | /// Return a version tuple that contains only the first 3 version components. |
| 91 | VersionTuple withoutBuild() const { |
| 92 | if (HasBuild) |
| 93 | return VersionTuple(Major, Minor, Subminor); |
| 94 | return *this; |
| 95 | } |
| 96 | |
| 97 | /// Determine if two version numbers are equivalent. If not |
| 98 | /// provided, minor and subminor version numbers are considered to be zero. |
| 99 | friend bool operator==(const VersionTuple &X, const VersionTuple &Y) { |
| 100 | return X.Major == Y.Major && X.Minor == Y.Minor && |
| 101 | X.Subminor == Y.Subminor && X.Build == Y.Build; |
| 102 | } |
| 103 | |
| 104 | /// Determine if two version numbers are not equivalent. |
| 105 | /// |
| 106 | /// If not provided, minor and subminor version numbers are considered to be |
| 107 | /// zero. |
| 108 | friend bool operator!=(const VersionTuple &X, const VersionTuple &Y) { |
| 109 | return !(X == Y); |
| 110 | } |
| 111 | |
| 112 | /// Determine whether one version number precedes another. |
| 113 | /// |
| 114 | /// If not provided, minor and subminor version numbers are considered to be |
| 115 | /// zero. |
| 116 | friend bool operator<(const VersionTuple &X, const VersionTuple &Y) { |
| 117 | return std::tie(X.Major, X.Minor, X.Subminor, X.Build) < |
| 118 | std::tie(Y.Major, Y.Minor, Y.Subminor, Y.Build); |
| 119 | } |
| 120 | |
| 121 | /// Determine whether one version number follows another. |
| 122 | /// |
| 123 | /// If not provided, minor and subminor version numbers are considered to be |
| 124 | /// zero. |
| 125 | friend bool operator>(const VersionTuple &X, const VersionTuple &Y) { |
| 126 | return Y < X; |
| 127 | } |
| 128 | |
| 129 | /// Determine whether one version number precedes or is |
| 130 | /// equivalent to another. |
| 131 | /// |
| 132 | /// If not provided, minor and subminor version numbers are considered to be |
| 133 | /// zero. |
| 134 | friend bool operator<=(const VersionTuple &X, const VersionTuple &Y) { |
| 135 | return !(Y < X); |
| 136 | } |
| 137 | |
| 138 | /// Determine whether one version number follows or is |
| 139 | /// equivalent to another. |
| 140 | /// |
| 141 | /// If not provided, minor and subminor version numbers are considered to be |
| 142 | /// zero. |
| 143 | friend bool operator>=(const VersionTuple &X, const VersionTuple &Y) { |
| 144 | return !(X < Y); |
| 145 | } |
| 146 | |
| 147 | /// Retrieve a string representation of the version number. |
| 148 | std::string getAsString() const; |
| 149 | |
| 150 | /// Try to parse the given string as a version number. |
| 151 | /// \returns \c true if the string does not match the regular expression |
| 152 | /// [0-9]+(\.[0-9]+){0,3} |
| 153 | bool tryParse(StringRef string); |
| 154 | }; |
| 155 | |
| 156 | /// Print a version number. |
| 157 | raw_ostream &operator<<(raw_ostream &Out, const VersionTuple &V); |
| 158 | |
| 159 | } // end namespace llvm |
| 160 | #endif // LLVM_SUPPORT_VERSIONTUPLE_H |
| 1 | // <tuple> -*- C++ -*- |
| 2 | |
| 3 | // Copyright (C) 2007-2016 Free Software Foundation, Inc. |
| 4 | // |
| 5 | // This file is part of the GNU ISO C++ Library. This library is free |
| 6 | // software; you can redistribute it and/or modify it under the |
| 7 | // terms of the GNU General Public License as published by the |
| 8 | // Free Software Foundation; either version 3, or (at your option) |
| 9 | // any later version. |
| 10 | |
| 11 | // This library is distributed in the hope that it will be useful, |
| 12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | // GNU General Public License for more details. |
| 15 | |
| 16 | // Under Section 7 of GPL version 3, you are granted additional |
| 17 | // permissions described in the GCC Runtime Library Exception, version |
| 18 | // 3.1, as published by the Free Software Foundation. |
| 19 | |
| 20 | // You should have received a copy of the GNU General Public License and |
| 21 | // a copy of the GCC Runtime Library Exception along with this program; |
| 22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| 23 | // <http://www.gnu.org/licenses/>. |
| 24 | |
| 25 | /** @file include/tuple |
| 26 | * This is a Standard C++ Library header. |
| 27 | */ |
| 28 | |
| 29 | #ifndef _GLIBCXX_TUPLE1 |
| 30 | #define _GLIBCXX_TUPLE1 1 |
| 31 | |
| 32 | #pragma GCC system_header |
| 33 | |
| 34 | #if __cplusplus201402L < 201103L |
| 35 | # include <bits/c++0x_warning.h> |
| 36 | #else |
| 37 | |
| 38 | #include <utility> |
| 39 | #include <array> |
| 40 | #include <bits/uses_allocator.h> |
| 41 | |
| 42 | namespace std _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default"))) |
| 43 | { |
| 44 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| 45 | |
| 46 | /** |
| 47 | * @addtogroup utilities |
| 48 | * @{ |
| 49 | */ |
| 50 | |
| 51 | template<std::size_t _Idx, typename _Head, bool _IsEmptyNotFinal> |
| 52 | struct _Head_base; |
| 53 | |
| 54 | template<std::size_t _Idx, typename _Head> |
| 55 | struct _Head_base<_Idx, _Head, true> |
| 56 | : public _Head |
| 57 | { |
| 58 | constexpr _Head_base() |
| 59 | : _Head() { } |
| 60 | |
| 61 | constexpr _Head_base(const _Head& __h) |
| 62 | : _Head(__h) { } |
| 63 | |
| 64 | constexpr _Head_base(const _Head_base&) = default; |
| 65 | constexpr _Head_base(_Head_base&&) = default; |
| 66 | |
| 67 | template<typename _UHead> |
| 68 | constexpr _Head_base(_UHead&& __h) |
| 69 | : _Head(std::forward<_UHead>(__h)) { } |
| 70 | |
| 71 | _Head_base(allocator_arg_t, __uses_alloc0) |
| 72 | : _Head() { } |
| 73 | |
| 74 | template<typename _Alloc> |
| 75 | _Head_base(allocator_arg_t, __uses_alloc1<_Alloc> __a) |
| 76 | : _Head(allocator_arg, *__a._M_a) { } |
| 77 | |
| 78 | template<typename _Alloc> |
| 79 | _Head_base(allocator_arg_t, __uses_alloc2<_Alloc> __a) |
| 80 | : _Head(*__a._M_a) { } |
| 81 | |
| 82 | template<typename _UHead> |
| 83 | _Head_base(__uses_alloc0, _UHead&& __uhead) |
| 84 | : _Head(std::forward<_UHead>(__uhead)) { } |
| 85 | |
| 86 | template<typename _Alloc, typename _UHead> |
| 87 | _Head_base(__uses_alloc1<_Alloc> __a, _UHead&& __uhead) |
| 88 | : _Head(allocator_arg, *__a._M_a, std::forward<_UHead>(__uhead)) { } |
| 89 | |
| 90 | template<typename _Alloc, typename _UHead> |
| 91 | _Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead) |
| 92 | : _Head(std::forward<_UHead>(__uhead), *__a._M_a) { } |
| 93 | |
| 94 | static constexpr _Head& |
| 95 | _M_head(_Head_base& __b) noexcept { return __b; } |
| 96 | |
| 97 | static constexpr const _Head& |
| 98 | _M_head(const _Head_base& __b) noexcept { return __b; } |
| 99 | }; |
| 100 | |
| 101 | template<std::size_t _Idx, typename _Head> |
| 102 | struct _Head_base<_Idx, _Head, false> |
| 103 | { |
| 104 | constexpr _Head_base() |
| 105 | : _M_head_impl() { } |
| 106 | |
| 107 | constexpr _Head_base(const _Head& __h) |
| 108 | : _M_head_impl(__h) { } |
| 109 | |
| 110 | constexpr _Head_base(const _Head_base&) = default; |
| 111 | constexpr _Head_base(_Head_base&&) = default; |
| 112 | |
| 113 | template<typename _UHead> |
| 114 | constexpr _Head_base(_UHead&& __h) |
| 115 | : _M_head_impl(std::forward<_UHead>(__h)) { } |
| 116 | |
| 117 | _Head_base(allocator_arg_t, __uses_alloc0) |
| 118 | : _M_head_impl() { } |
| 119 | |
| 120 | template<typename _Alloc> |
| 121 | _Head_base(allocator_arg_t, __uses_alloc1<_Alloc> __a) |
| 122 | : _M_head_impl(allocator_arg, *__a._M_a) { } |
| 123 | |
| 124 | template<typename _Alloc> |
| 125 | _Head_base(allocator_arg_t, __uses_alloc2<_Alloc> __a) |
| 126 | : _M_head_impl(*__a._M_a) { } |
| 127 | |
| 128 | template<typename _UHead> |
| 129 | _Head_base(__uses_alloc0, _UHead&& __uhead) |
| 130 | : _M_head_impl(std::forward<_UHead>(__uhead)) { } |
| 131 | |
| 132 | template<typename _Alloc, typename _UHead> |
| 133 | _Head_base(__uses_alloc1<_Alloc> __a, _UHead&& __uhead) |
| 134 | : _M_head_impl(allocator_arg, *__a._M_a, std::forward<_UHead>(__uhead)) |
| 135 | { } |
| 136 | |
| 137 | template<typename _Alloc, typename _UHead> |
| 138 | _Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead) |
| 139 | : _M_head_impl(std::forward<_UHead>(__uhead), *__a._M_a) { } |
| 140 | |
| 141 | static constexpr _Head& |
| 142 | _M_head(_Head_base& __b) noexcept { return __b._M_head_impl; } |
| 143 | |
| 144 | static constexpr const _Head& |
| 145 | _M_head(const _Head_base& __b) noexcept { return __b._M_head_impl; } |
| 146 | |
| 147 | _Head _M_head_impl; |
| 148 | }; |
| 149 | |
| 150 | /** |
| 151 | * Contains the actual implementation of the @c tuple template, stored |
| 152 | * as a recursive inheritance hierarchy from the first element (most |
| 153 | * derived class) to the last (least derived class). The @c Idx |
| 154 | * parameter gives the 0-based index of the element stored at this |
| 155 | * point in the hierarchy; we use it to implement a constant-time |
| 156 | * get() operation. |
| 157 | */ |
| 158 | template<std::size_t _Idx, typename... _Elements> |
| 159 | struct _Tuple_impl; |
| 160 | |
| 161 | template<typename _Tp> |
| 162 | struct __is_empty_non_tuple : is_empty<_Tp> { }; |
| 163 | |
| 164 | // Using EBO for elements that are tuples causes ambiguous base errors. |
| 165 | template<typename _El0, typename... _El> |
| 166 | struct __is_empty_non_tuple<tuple<_El0, _El...>> : false_type { }; |
| 167 | |
| 168 | // Use the Empty Base-class Optimization for empty, non-final types. |
| 169 | template<typename _Tp> |
| 170 | using __empty_not_final |
| 171 | = typename conditional<__is_final(_Tp), false_type, |
| 172 | __is_empty_non_tuple<_Tp>>::type; |
| 173 | |
| 174 | /** |
| 175 | * Recursive tuple implementation. Here we store the @c Head element |
| 176 | * and derive from a @c Tuple_impl containing the remaining elements |
| 177 | * (which contains the @c Tail). |
| 178 | */ |
| 179 | template<std::size_t _Idx, typename _Head, typename... _Tail> |
| 180 | struct _Tuple_impl<_Idx, _Head, _Tail...> |
| 181 | : public _Tuple_impl<_Idx + 1, _Tail...>, |
| 182 | private _Head_base<_Idx, _Head, __empty_not_final<_Head>::value> |
| 183 | { |
| 184 | template<std::size_t, typename...> friend class _Tuple_impl; |
| 185 | |
| 186 | typedef _Tuple_impl<_Idx + 1, _Tail...> _Inherited; |
| 187 | typedef _Head_base<_Idx, _Head, __empty_not_final<_Head>::value> _Base; |
| 188 | |
| 189 | static constexpr _Head& |
| 190 | _M_head(_Tuple_impl& __t) noexcept { return _Base::_M_head(__t); } |
| 191 | |
| 192 | static constexpr const _Head& |
| 193 | _M_head(const _Tuple_impl& __t) noexcept { return _Base::_M_head(__t); } |
| 194 | |
| 195 | static constexpr _Inherited& |
| 196 | _M_tail(_Tuple_impl& __t) noexcept { return __t; } |
| 197 | |
| 198 | static constexpr const _Inherited& |
| 199 | _M_tail(const _Tuple_impl& __t) noexcept { return __t; } |
| 200 | |
| 201 | constexpr _Tuple_impl() |
| 202 | : _Inherited(), _Base() { } |
| 203 | |
| 204 | explicit |
| 205 | constexpr _Tuple_impl(const _Head& __head, const _Tail&... __tail) |
| 206 | : _Inherited(__tail...), _Base(__head) { } |
| 207 | |
| 208 | template<typename _UHead, typename... _UTail, typename = typename |
| 209 | enable_if<sizeof...(_Tail) == sizeof...(_UTail)>::type> |
| 210 | explicit |
| 211 | constexpr _Tuple_impl(_UHead&& __head, _UTail&&... __tail) |
| 212 | : _Inherited(std::forward<_UTail>(__tail)...), |
| 213 | _Base(std::forward<_UHead>(__head)) { } |
| 214 | |
| 215 | constexpr _Tuple_impl(const _Tuple_impl&) = default; |
| 216 | |
| 217 | constexpr |
| 218 | _Tuple_impl(_Tuple_impl&& __in) |
| 219 | noexcept(__and_<is_nothrow_move_constructible<_Head>, |
| 220 | is_nothrow_move_constructible<_Inherited>>::value) |
| 221 | : _Inherited(std::move(_M_tail(__in))), |
| 222 | _Base(std::forward<_Head>(_M_head(__in))) { } |
| 223 | |
| 224 | template<typename... _UElements> |
| 225 | constexpr _Tuple_impl(const _Tuple_impl<_Idx, _UElements...>& __in) |
| 226 | : _Inherited(_Tuple_impl<_Idx, _UElements...>::_M_tail(__in)), |
| 227 | _Base(_Tuple_impl<_Idx, _UElements...>::_M_head(__in)) { } |
| 228 | |
| 229 | template<typename _UHead, typename... _UTails> |
| 230 | constexpr _Tuple_impl(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in) |
| 231 | : _Inherited(std::move |
| 232 | (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))), |
| 233 | _Base(std::forward<_UHead> |
| 234 | (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in))) { } |
| 235 | |
| 236 | template<typename _Alloc> |
| 237 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a) |
| 238 | : _Inherited(__tag, __a), |
| 239 | _Base(__tag, __use_alloc<_Head>(__a)) { } |
| 240 | |
| 241 | template<typename _Alloc> |
| 242 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 243 | const _Head& __head, const _Tail&... __tail) |
| 244 | : _Inherited(__tag, __a, __tail...), |
| 245 | _Base(__use_alloc<_Head, _Alloc, _Head>(__a), __head) { } |
| 246 | |
| 247 | template<typename _Alloc, typename _UHead, typename... _UTail, |
| 248 | typename = typename enable_if<sizeof...(_Tail) |
| 249 | == sizeof...(_UTail)>::type> |
| 250 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 251 | _UHead&& __head, _UTail&&... __tail) |
| 252 | : _Inherited(__tag, __a, std::forward<_UTail>(__tail)...), |
| 253 | _Base(__use_alloc<_Head, _Alloc, _UHead>(__a), |
| 254 | std::forward<_UHead>(__head)) { } |
| 255 | |
| 256 | template<typename _Alloc> |
| 257 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 258 | const _Tuple_impl& __in) |
| 259 | : _Inherited(__tag, __a, _M_tail(__in)), |
| 260 | _Base(__use_alloc<_Head, _Alloc, _Head>(__a), _M_head(__in)) { } |
| 261 | |
| 262 | template<typename _Alloc> |
| 263 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 264 | _Tuple_impl&& __in) |
| 265 | : _Inherited(__tag, __a, std::move(_M_tail(__in))), |
| 266 | _Base(__use_alloc<_Head, _Alloc, _Head>(__a), |
| 267 | std::forward<_Head>(_M_head(__in))) { } |
| 268 | |
| 269 | template<typename _Alloc, typename... _UElements> |
| 270 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 271 | const _Tuple_impl<_Idx, _UElements...>& __in) |
| 272 | : _Inherited(__tag, __a, |
| 273 | _Tuple_impl<_Idx, _UElements...>::_M_tail(__in)), |
| 274 | _Base(__use_alloc<_Head, _Alloc, _Head>(__a), |
| 275 | _Tuple_impl<_Idx, _UElements...>::_M_head(__in)) { } |
| 276 | |
| 277 | template<typename _Alloc, typename _UHead, typename... _UTails> |
| 278 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 279 | _Tuple_impl<_Idx, _UHead, _UTails...>&& __in) |
| 280 | : _Inherited(__tag, __a, std::move |
| 281 | (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))), |
| 282 | _Base(__use_alloc<_Head, _Alloc, _UHead>(__a), |
| 283 | std::forward<_UHead> |
| 284 | (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in))) { } |
| 285 | |
| 286 | _Tuple_impl& |
| 287 | operator=(const _Tuple_impl& __in) |
| 288 | { |
| 289 | _M_head(*this) = _M_head(__in); |
| 290 | _M_tail(*this) = _M_tail(__in); |
| 291 | return *this; |
| 292 | } |
| 293 | |
| 294 | _Tuple_impl& |
| 295 | operator=(_Tuple_impl&& __in) |
| 296 | noexcept(__and_<is_nothrow_move_assignable<_Head>, |
| 297 | is_nothrow_move_assignable<_Inherited>>::value) |
| 298 | { |
| 299 | _M_head(*this) = std::forward<_Head>(_M_head(__in)); |
| 300 | _M_tail(*this) = std::move(_M_tail(__in)); |
| 301 | return *this; |
| 302 | } |
| 303 | |
| 304 | template<typename... _UElements> |
| 305 | _Tuple_impl& |
| 306 | operator=(const _Tuple_impl<_Idx, _UElements...>& __in) |
| 307 | { |
| 308 | _M_head(*this) = _Tuple_impl<_Idx, _UElements...>::_M_head(__in); |
| 309 | _M_tail(*this) = _Tuple_impl<_Idx, _UElements...>::_M_tail(__in); |
| 310 | return *this; |
| 311 | } |
| 312 | |
| 313 | template<typename _UHead, typename... _UTails> |
| 314 | _Tuple_impl& |
| 315 | operator=(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in) |
| 316 | { |
| 317 | _M_head(*this) = std::forward<_UHead> |
| 318 | (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in)); |
| 319 | _M_tail(*this) = std::move |
| 320 | (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in)); |
| 321 | return *this; |
| 322 | } |
| 323 | |
| 324 | protected: |
| 325 | void |
| 326 | _M_swap(_Tuple_impl& __in) |
| 327 | noexcept(__is_nothrow_swappable<_Head>::value |
| 328 | && noexcept(_M_tail(__in)._M_swap(_M_tail(__in)))) |
| 329 | { |
| 330 | using std::swap; |
| 331 | swap(_M_head(*this), _M_head(__in)); |
| 332 | _Inherited::_M_swap(_M_tail(__in)); |
| 333 | } |
| 334 | }; |
| 335 | |
| 336 | // Basis case of inheritance recursion. |
| 337 | template<std::size_t _Idx, typename _Head> |
| 338 | struct _Tuple_impl<_Idx, _Head> |
| 339 | : private _Head_base<_Idx, _Head, __empty_not_final<_Head>::value> |
| 340 | { |
| 341 | template<std::size_t, typename...> friend class _Tuple_impl; |
| 342 | |
| 343 | typedef _Head_base<_Idx, _Head, __empty_not_final<_Head>::value> _Base; |
| 344 | |
| 345 | static constexpr _Head& |
| 346 | _M_head(_Tuple_impl& __t) noexcept { return _Base::_M_head(__t); } |
| 347 | |
| 348 | static constexpr const _Head& |
| 349 | _M_head(const _Tuple_impl& __t) noexcept { return _Base::_M_head(__t); } |
| 350 | |
| 351 | constexpr _Tuple_impl() |
| 352 | : _Base() { } |
| 353 | |
| 354 | explicit |
| 355 | constexpr _Tuple_impl(const _Head& __head) |
| 356 | : _Base(__head) { } |
| 357 | |
| 358 | template<typename _UHead> |
| 359 | explicit |
| 360 | constexpr _Tuple_impl(_UHead&& __head) |
| 361 | : _Base(std::forward<_UHead>(__head)) { } |
| 362 | |
| 363 | constexpr _Tuple_impl(const _Tuple_impl&) = default; |
| 364 | |
| 365 | constexpr |
| 366 | _Tuple_impl(_Tuple_impl&& __in) |
| 367 | noexcept(is_nothrow_move_constructible<_Head>::value) |
| 368 | : _Base(std::forward<_Head>(_M_head(__in))) { } |
| 369 | |
| 370 | template<typename _UHead> |
| 371 | constexpr _Tuple_impl(const _Tuple_impl<_Idx, _UHead>& __in) |
| 372 | : _Base(_Tuple_impl<_Idx, _UHead>::_M_head(__in)) { } |
| 373 | |
| 374 | template<typename _UHead> |
| 375 | constexpr _Tuple_impl(_Tuple_impl<_Idx, _UHead>&& __in) |
| 376 | : _Base(std::forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in))) |
| 377 | { } |
| 378 | |
| 379 | template<typename _Alloc> |
| 380 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a) |
| 381 | : _Base(__tag, __use_alloc<_Head>(__a)) { } |
| 382 | |
| 383 | template<typename _Alloc> |
| 384 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 385 | const _Head& __head) |
| 386 | : _Base(__use_alloc<_Head, _Alloc, _Head>(__a), __head) { } |
| 387 | |
| 388 | template<typename _Alloc, typename _UHead> |
| 389 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 390 | _UHead&& __head) |
| 391 | : _Base(__use_alloc<_Head, _Alloc, _UHead>(__a), |
| 392 | std::forward<_UHead>(__head)) { } |
| 393 | |
| 394 | template<typename _Alloc> |
| 395 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 396 | const _Tuple_impl& __in) |
| 397 | : _Base(__use_alloc<_Head, _Alloc, _Head>(__a), _M_head(__in)) { } |
| 398 | |
| 399 | template<typename _Alloc> |
| 400 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 401 | _Tuple_impl&& __in) |
| 402 | : _Base(__use_alloc<_Head, _Alloc, _Head>(__a), |
| 403 | std::forward<_Head>(_M_head(__in))) { } |
| 404 | |
| 405 | template<typename _Alloc, typename _UHead> |
| 406 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 407 | const _Tuple_impl<_Idx, _UHead>& __in) |
| 408 | : _Base(__use_alloc<_Head, _Alloc, _Head>(__a), |
| 409 | _Tuple_impl<_Idx, _UHead>::_M_head(__in)) { } |
| 410 | |
| 411 | template<typename _Alloc, typename _UHead> |
| 412 | _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
| 413 | _Tuple_impl<_Idx, _UHead>&& __in) |
| 414 | : _Base(__use_alloc<_Head, _Alloc, _UHead>(__a), |
| 415 | std::forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in))) |
| 416 | { } |
| 417 | |
| 418 | _Tuple_impl& |
| 419 | operator=(const _Tuple_impl& __in) |
| 420 | { |
| 421 | _M_head(*this) = _M_head(__in); |
| 422 | return *this; |
| 423 | } |
| 424 | |
| 425 | _Tuple_impl& |
| 426 | operator=(_Tuple_impl&& __in) |
| 427 | noexcept(is_nothrow_move_assignable<_Head>::value) |
| 428 | { |
| 429 | _M_head(*this) = std::forward<_Head>(_M_head(__in)); |
| 430 | return *this; |
| 431 | } |
| 432 | |
| 433 | template<typename _UHead> |
| 434 | _Tuple_impl& |
| 435 | operator=(const _Tuple_impl<_Idx, _UHead>& __in) |
| 436 | { |
| 437 | _M_head(*this) = _Tuple_impl<_Idx, _UHead>::_M_head(__in); |
| 438 | return *this; |
| 439 | } |
| 440 | |
| 441 | template<typename _UHead> |
| 442 | _Tuple_impl& |
| 443 | operator=(_Tuple_impl<_Idx, _UHead>&& __in) |
| 444 | { |
| 445 | _M_head(*this) |
| 446 | = std::forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in)); |
| 447 | return *this; |
| 448 | } |
| 449 | |
| 450 | protected: |
| 451 | void |
| 452 | _M_swap(_Tuple_impl& __in) |
| 453 | noexcept(__is_nothrow_swappable<_Head>::value) |
| 454 | { |
| 455 | using std::swap; |
| 456 | swap(_M_head(*this), _M_head(__in)); |
| 457 | } |
| 458 | }; |
| 459 | |
| 460 | template<typename... _Elements> |
| 461 | class tuple; |
| 462 | |
| 463 | // Concept utility functions, reused in conditionally-explicit |
| 464 | // constructors. |
| 465 | template<bool, typename... _Elements> |
| 466 | struct _TC |
| 467 | { |
| 468 | template<typename... _UElements> |
| 469 | static constexpr bool _ConstructibleTuple() |
| 470 | { |
| 471 | return __and_<is_constructible<_Elements, const _UElements&>...>::value; |
| 472 | } |
| 473 | |
| 474 | template<typename... _UElements> |
| 475 | static constexpr bool _ImplicitlyConvertibleTuple() |
| 476 | { |
| 477 | return __and_<is_convertible<const _UElements&, _Elements>...>::value; |
| 478 | } |
| 479 | |
| 480 | template<typename... _UElements> |
| 481 | static constexpr bool _MoveConstructibleTuple() |
| 482 | { |
| 483 | return __and_<is_constructible<_Elements, _UElements&&>...>::value; |
| 484 | } |
| 485 | |
| 486 | template<typename... _UElements> |
| 487 | static constexpr bool _ImplicitlyMoveConvertibleTuple() |
| 488 | { |
| 489 | return __and_<is_convertible<_UElements&&, _Elements>...>::value; |
| 490 | } |
| 491 | |
| 492 | template<typename _SrcTuple> |
| 493 | static constexpr bool _NonNestedTuple() |
| 494 | { |
| 495 | return __and_<__not_<is_same<tuple<_Elements...>, |
| 496 | typename remove_cv< |
| 497 | typename remove_reference<_SrcTuple>::type |
| 498 | >::type>>, |
| 499 | __not_<is_convertible<_SrcTuple, _Elements...>>, |
| 500 | __not_<is_constructible<_Elements..., _SrcTuple>> |
| 501 | >::value; |
| 502 | } |
| 503 | template<typename... _UElements> |
| 504 | static constexpr bool _NotSameTuple() |
| 505 | { |
| 506 | return __not_<is_same<tuple<_Elements...>, |
| 507 | typename remove_const< |
| 508 | typename remove_reference<_UElements...>::type |
| 509 | >::type>>::value; |
| 510 | } |
| 511 | }; |
| 512 | |
| 513 | template<typename... _Elements> |
| 514 | struct _TC<false, _Elements...> |
| 515 | { |
| 516 | template<typename... _UElements> |
| 517 | static constexpr bool _ConstructibleTuple() |
| 518 | { |
| 519 | return false; |
| 520 | } |
| 521 | |
| 522 | template<typename... _UElements> |
| 523 | static constexpr bool _ImplicitlyConvertibleTuple() |
| 524 | { |
| 525 | return false; |
| 526 | } |
| 527 | |
| 528 | template<typename... _UElements> |
| 529 | static constexpr bool _MoveConstructibleTuple() |
| 530 | { |
| 531 | return false; |
| 532 | } |
| 533 | |
| 534 | template<typename... _UElements> |
| 535 | static constexpr bool _ImplicitlyMoveConvertibleTuple() |
| 536 | { |
| 537 | return false; |
| 538 | } |
| 539 | |
| 540 | template<typename... _UElements> |
| 541 | static constexpr bool _NonNestedTuple() |
| 542 | { |
| 543 | return true; |
| 544 | } |
| 545 | template<typename... _UElements> |
| 546 | static constexpr bool _NotSameTuple() |
| 547 | { |
| 548 | return true; |
| 549 | } |
| 550 | }; |
| 551 | |
| 552 | /// Primary class template, tuple |
| 553 | template<typename... _Elements> |
| 554 | class tuple : public _Tuple_impl<0, _Elements...> |
| 555 | { |
| 556 | typedef _Tuple_impl<0, _Elements...> _Inherited; |
| 557 | |
| 558 | // Used for constraining the default constructor so |
| 559 | // that it becomes dependent on the constraints. |
| 560 | template<typename _Dummy> |
| 561 | struct _TC2 |
| 562 | { |
| 563 | static constexpr bool _DefaultConstructibleTuple() |
| 564 | { |
| 565 | return __and_<is_default_constructible<_Elements>...>::value; |
| 566 | } |
| 567 | static constexpr bool _ImplicitlyDefaultConstructibleTuple() |
| 568 | { |
| 569 | return __and_<__is_implicitly_default_constructible<_Elements>...> |
| 570 | ::value; |
| 571 | } |
| 572 | }; |
| 573 | |
| 574 | public: |
| 575 | template<typename _Dummy = void, |
| 576 | typename enable_if<_TC2<_Dummy>:: |
| 577 | _ImplicitlyDefaultConstructibleTuple(), |
| 578 | bool>::type = true> |
| 579 | constexpr tuple() |
| 580 | : _Inherited() { } |
| 581 | |
| 582 | template<typename _Dummy = void, |
| 583 | typename enable_if<_TC2<_Dummy>:: |
| 584 | _DefaultConstructibleTuple() |
| 585 | && |
| 586 | !_TC2<_Dummy>:: |
| 587 | _ImplicitlyDefaultConstructibleTuple(), |
| 588 | bool>::type = false> |
| 589 | explicit constexpr tuple() |
| 590 | : _Inherited() { } |
| 591 | |
| 592 | // Shortcut for the cases where constructors taking _Elements... |
| 593 | // need to be constrained. |
| 594 | template<typename _Dummy> using _TCC = |
| 595 | _TC<is_same<_Dummy, void>::value, |
| 596 | _Elements...>; |
| 597 | |
| 598 | template<typename _Dummy = void, |
| 599 | typename enable_if< |
| 600 | _TCC<_Dummy>::template |
| 601 | _ConstructibleTuple<_Elements...>() |
| 602 | && _TCC<_Dummy>::template |
| 603 | _ImplicitlyConvertibleTuple<_Elements...>() |
| 604 | && (sizeof...(_Elements) >= 1), |
| 605 | bool>::type=true> |
| 606 | constexpr tuple(const _Elements&... __elements) |
| 607 | : _Inherited(__elements...) { } |
| 608 | |
| 609 | template<typename _Dummy = void, |
| 610 | typename enable_if< |
| 611 | _TCC<_Dummy>::template |
| 612 | _ConstructibleTuple<_Elements...>() |
| 613 | && !_TCC<_Dummy>::template |
| 614 | _ImplicitlyConvertibleTuple<_Elements...>() |
| 615 | && (sizeof...(_Elements) >= 1), |
| 616 | bool>::type=false> |
| 617 | explicit constexpr tuple(const _Elements&... __elements) |
| 618 | : _Inherited(__elements...) { } |
| 619 | |
| 620 | // Shortcut for the cases where constructors taking _UElements... |
| 621 | // need to be constrained. |
| 622 | template<typename... _UElements> using _TMC = |
| 623 | _TC<(sizeof...(_Elements) == sizeof...(_UElements)), |
| 624 | _Elements...>; |
| 625 | |
| 626 | template<typename... _UElements, typename |
| 627 | enable_if< |
| 628 | _TC<sizeof...(_UElements) == 1, _Elements...>::template |
| 629 | _NotSameTuple<_UElements...>() |
| 630 | && _TMC<_UElements...>::template |
| 631 | _MoveConstructibleTuple<_UElements...>() |
| 632 | && _TMC<_UElements...>::template |
| 633 | _ImplicitlyMoveConvertibleTuple<_UElements...>() |
| 634 | && (sizeof...(_Elements) >= 1), |
| 635 | bool>::type=true> |
| 636 | constexpr tuple(_UElements&&... __elements) |
| 637 | : _Inherited(std::forward<_UElements>(__elements)...) { } |
| 638 | |
| 639 | template<typename... _UElements, typename |
| 640 | enable_if< |
| 641 | _TC<sizeof...(_UElements) == 1, _Elements...>::template |
| 642 | _NotSameTuple<_UElements...>() |
| 643 | && _TMC<_UElements...>::template |
| 644 | _MoveConstructibleTuple<_UElements...>() |
| 645 | && !_TMC<_UElements...>::template |
| 646 | _ImplicitlyMoveConvertibleTuple<_UElements...>() |
| 647 | && (sizeof...(_Elements) >= 1), |
| 648 | bool>::type=false> |
| 649 | explicit constexpr tuple(_UElements&&... __elements) |
| 650 | : _Inherited(std::forward<_UElements>(__elements)...) { } |
| 651 | |
| 652 | constexpr tuple(const tuple&) = default; |
| 653 | |
| 654 | constexpr tuple(tuple&&) = default; |
| 655 | |
| 656 | // Shortcut for the cases where constructors taking tuples |
| 657 | // must avoid creating temporaries. |
| 658 | template<typename _Dummy> using _TNTC = |
| 659 | _TC<is_same<_Dummy, void>::value && sizeof...(_Elements) == 1, |
| 660 | _Elements...>; |
| 661 | |
| 662 | template<typename... _UElements, typename _Dummy = void, typename |
| 663 | enable_if<_TMC<_UElements...>::template |
| 664 | _ConstructibleTuple<_UElements...>() |
| 665 | && _TMC<_UElements...>::template |
| 666 | _ImplicitlyConvertibleTuple<_UElements...>() |
| 667 | && _TNTC<_Dummy>::template |
| 668 | _NonNestedTuple<const tuple<_UElements...>&>(), |
| 669 | bool>::type=true> |
| 670 | constexpr tuple(const tuple<_UElements...>& __in) |
| 671 | : _Inherited(static_cast<const _Tuple_impl<0, _UElements...>&>(__in)) |
| 672 | { } |
| 673 | |
| 674 | template<typename... _UElements, typename _Dummy = void, typename |
| 675 | enable_if<_TMC<_UElements...>::template |
| 676 | _ConstructibleTuple<_UElements...>() |
| 677 | && !_TMC<_UElements...>::template |
| 678 | _ImplicitlyConvertibleTuple<_UElements...>() |
| 679 | && _TNTC<_Dummy>::template |
| 680 | _NonNestedTuple<const tuple<_UElements...>&>(), |
| 681 | bool>::type=false> |
| 682 | explicit constexpr tuple(const tuple<_UElements...>& __in) |
| 683 | : _Inherited(static_cast<const _Tuple_impl<0, _UElements...>&>(__in)) |
| 684 | { } |
| 685 | |
| 686 | template<typename... _UElements, typename _Dummy = void, typename |
| 687 | enable_if<_TMC<_UElements...>::template |
| 688 | _MoveConstructibleTuple<_UElements...>() |
| 689 | && _TMC<_UElements...>::template |
| 690 | _ImplicitlyMoveConvertibleTuple<_UElements...>() |
| 691 | && _TNTC<_Dummy>::template |
| 692 | _NonNestedTuple<tuple<_UElements...>&&>(), |
| 693 | bool>::type=true> |
| 694 | constexpr tuple(tuple<_UElements...>&& __in) |
| 695 | : _Inherited(static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) { } |
| 696 | |
| 697 | template<typename... _UElements, typename _Dummy = void, typename |
| 698 | enable_if<_TMC<_UElements...>::template |
| 699 | _MoveConstructibleTuple<_UElements...>() |
| 700 | && !_TMC<_UElements...>::template |
| 701 | _ImplicitlyMoveConvertibleTuple<_UElements...>() |
| 702 | && _TNTC<_Dummy>::template |
| 703 | _NonNestedTuple<tuple<_UElements...>&&>(), |
| 704 | bool>::type=false> |
| 705 | explicit constexpr tuple(tuple<_UElements...>&& __in) |
| 706 | : _Inherited(static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) { } |
| 707 | |
| 708 | // Allocator-extended constructors. |
| 709 | |
| 710 | template<typename _Alloc> |
| 711 | tuple(allocator_arg_t __tag, const _Alloc& __a) |
| 712 | : _Inherited(__tag, __a) { } |
| 713 | |
| 714 | template<typename _Alloc, typename _Dummy = void, |
| 715 | typename enable_if< |
| 716 | _TCC<_Dummy>::template |
| 717 | _ConstructibleTuple<_Elements...>() |
| 718 | && _TCC<_Dummy>::template |
| 719 | _ImplicitlyConvertibleTuple<_Elements...>(), |
| 720 | bool>::type=true> |
| 721 | tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 722 | const _Elements&... __elements) |
| 723 | : _Inherited(__tag, __a, __elements...) { } |
| 724 | |
| 725 | template<typename _Alloc, typename _Dummy = void, |
| 726 | typename enable_if< |
| 727 | _TCC<_Dummy>::template |
| 728 | _ConstructibleTuple<_Elements...>() |
| 729 | && !_TCC<_Dummy>::template |
| 730 | _ImplicitlyConvertibleTuple<_Elements...>(), |
| 731 | bool>::type=false> |
| 732 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 733 | const _Elements&... __elements) |
| 734 | : _Inherited(__tag, __a, __elements...) { } |
| 735 | |
| 736 | template<typename _Alloc, typename... _UElements, typename |
| 737 | enable_if<_TMC<_UElements...>::template |
| 738 | _MoveConstructibleTuple<_UElements...>() |
| 739 | && _TMC<_UElements...>::template |
| 740 | _ImplicitlyMoveConvertibleTuple<_UElements...>(), |
| 741 | bool>::type=true> |
| 742 | tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 743 | _UElements&&... __elements) |
| 744 | : _Inherited(__tag, __a, std::forward<_UElements>(__elements)...) |
| 745 | { } |
| 746 | |
| 747 | template<typename _Alloc, typename... _UElements, typename |
| 748 | enable_if<_TMC<_UElements...>::template |
| 749 | _MoveConstructibleTuple<_UElements...>() |
| 750 | && !_TMC<_UElements...>::template |
| 751 | _ImplicitlyMoveConvertibleTuple<_UElements...>(), |
| 752 | bool>::type=false> |
| 753 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 754 | _UElements&&... __elements) |
| 755 | : _Inherited(__tag, __a, std::forward<_UElements>(__elements)...) |
| 756 | { } |
| 757 | |
| 758 | template<typename _Alloc> |
| 759 | tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in) |
| 760 | : _Inherited(__tag, __a, static_cast<const _Inherited&>(__in)) { } |
| 761 | |
| 762 | template<typename _Alloc> |
| 763 | tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in) |
| 764 | : _Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { } |
| 765 | |
| 766 | template<typename _Alloc, typename... _UElements, typename |
| 767 | enable_if<_TMC<_UElements...>::template |
| 768 | _ConstructibleTuple<_UElements...>() |
| 769 | && _TMC<_UElements...>::template |
| 770 | _ImplicitlyConvertibleTuple<_UElements...>(), |
| 771 | bool>::type=true> |
| 772 | tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 773 | const tuple<_UElements...>& __in) |
| 774 | : _Inherited(__tag, __a, |
| 775 | static_cast<const _Tuple_impl<0, _UElements...>&>(__in)) |
| 776 | { } |
| 777 | |
| 778 | template<typename _Alloc, typename... _UElements, typename |
| 779 | enable_if<_TMC<_UElements...>::template |
| 780 | _ConstructibleTuple<_UElements...>() |
| 781 | && !_TMC<_UElements...>::template |
| 782 | _ImplicitlyConvertibleTuple<_UElements...>(), |
| 783 | bool>::type=false> |
| 784 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 785 | const tuple<_UElements...>& __in) |
| 786 | : _Inherited(__tag, __a, |
| 787 | static_cast<const _Tuple_impl<0, _UElements...>&>(__in)) |
| 788 | { } |
| 789 | |
| 790 | template<typename _Alloc, typename... _UElements, typename |
| 791 | enable_if<_TMC<_UElements...>::template |
| 792 | _MoveConstructibleTuple<_UElements...>() |
| 793 | && _TMC<_UElements...>::template |
| 794 | _ImplicitlyMoveConvertibleTuple<_UElements...>(), |
| 795 | bool>::type=true> |
| 796 | tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 797 | tuple<_UElements...>&& __in) |
| 798 | : _Inherited(__tag, __a, |
| 799 | static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) |
| 800 | { } |
| 801 | |
| 802 | template<typename _Alloc, typename... _UElements, typename |
| 803 | enable_if<_TMC<_UElements...>::template |
| 804 | _MoveConstructibleTuple<_UElements...>() |
| 805 | && !_TMC<_UElements...>::template |
| 806 | _ImplicitlyMoveConvertibleTuple<_UElements...>(), |
| 807 | bool>::type=false> |
| 808 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 809 | tuple<_UElements...>&& __in) |
| 810 | : _Inherited(__tag, __a, |
| 811 | static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) |
| 812 | { } |
| 813 | |
| 814 | tuple& |
| 815 | operator=(const tuple& __in) |
| 816 | { |
| 817 | static_cast<_Inherited&>(*this) = __in; |
| 818 | return *this; |
| 819 | } |
| 820 | |
| 821 | tuple& |
| 822 | operator=(tuple&& __in) |
| 823 | noexcept(is_nothrow_move_assignable<_Inherited>::value) |
| 824 | { |
| 825 | static_cast<_Inherited&>(*this) = std::move(__in); |
| 826 | return *this; |
| 827 | } |
| 828 | |
| 829 | template<typename... _UElements, typename = typename |
| 830 | enable_if<sizeof...(_UElements) |
| 831 | == sizeof...(_Elements)>::type> |
| 832 | tuple& |
| 833 | operator=(const tuple<_UElements...>& __in) |
| 834 | { |
| 835 | static_cast<_Inherited&>(*this) = __in; |
| 836 | return *this; |
| 837 | } |
| 838 | |
| 839 | template<typename... _UElements, typename = typename |
| 840 | enable_if<sizeof...(_UElements) |
| 841 | == sizeof...(_Elements)>::type> |
| 842 | tuple& |
| 843 | operator=(tuple<_UElements...>&& __in) |
| 844 | { |
| 845 | static_cast<_Inherited&>(*this) = std::move(__in); |
| 846 | return *this; |
| 847 | } |
| 848 | |
| 849 | void |
| 850 | swap(tuple& __in) |
| 851 | noexcept(noexcept(__in._M_swap(__in))) |
| 852 | { _Inherited::_M_swap(__in); } |
| 853 | }; |
| 854 | |
| 855 | // Explicit specialization, zero-element tuple. |
| 856 | template<> |
| 857 | class tuple<> |
| 858 | { |
| 859 | public: |
| 860 | void swap(tuple&) noexcept { /* no-op */ } |
| 861 | }; |
| 862 | |
| 863 | /// Partial specialization, 2-element tuple. |
| 864 | /// Includes construction and assignment from a pair. |
| 865 | template<typename _T1, typename _T2> |
| 866 | class tuple<_T1, _T2> : public _Tuple_impl<0, _T1, _T2> |
| 867 | { |
| 868 | typedef _Tuple_impl<0, _T1, _T2> _Inherited; |
| 869 | |
| 870 | public: |
| 871 | template <typename _U1 = _T1, |
| 872 | typename _U2 = _T2, |
| 873 | typename enable_if<__and_< |
| 874 | __is_implicitly_default_constructible<_U1>, |
| 875 | __is_implicitly_default_constructible<_U2>> |
| 876 | ::value, bool>::type = true> |
| 877 | |
| 878 | constexpr tuple() |
| 879 | : _Inherited() { } |
| 880 | |
| 881 | template <typename _U1 = _T1, |
| 882 | typename _U2 = _T2, |
| 883 | typename enable_if< |
| 884 | __and_< |
| 885 | is_default_constructible<_U1>, |
| 886 | is_default_constructible<_U2>, |
| 887 | __not_< |
| 888 | __and_<__is_implicitly_default_constructible<_U1>, |
| 889 | __is_implicitly_default_constructible<_U2>>>> |
| 890 | ::value, bool>::type = false> |
| 891 | |
| 892 | explicit constexpr tuple() |
| 893 | : _Inherited() { } |
| 894 | |
| 895 | // Shortcut for the cases where constructors taking _T1, _T2 |
| 896 | // need to be constrained. |
| 897 | template<typename _Dummy> using _TCC = |
| 898 | _TC<is_same<_Dummy, void>::value, _T1, _T2>; |
| 899 | |
| 900 | template<typename _Dummy = void, typename |
| 901 | enable_if<_TCC<_Dummy>::template |
| 902 | _ConstructibleTuple<_T1, _T2>() |
| 903 | && _TCC<_Dummy>::template |
| 904 | _ImplicitlyConvertibleTuple<_T1, _T2>(), |
| 905 | bool>::type = true> |
| 906 | constexpr tuple(const _T1& __a1, const _T2& __a2) |
| 907 | : _Inherited(__a1, __a2) { } |
| 908 | |
| 909 | template<typename _Dummy = void, typename |
| 910 | enable_if<_TCC<_Dummy>::template |
| 911 | _ConstructibleTuple<_T1, _T2>() |
| 912 | && !_TCC<_Dummy>::template |
| 913 | _ImplicitlyConvertibleTuple<_T1, _T2>(), |
| 914 | bool>::type = false> |
| 915 | explicit constexpr tuple(const _T1& __a1, const _T2& __a2) |
| 916 | : _Inherited(__a1, __a2) { } |
| 917 | |
| 918 | // Shortcut for the cases where constructors taking _U1, _U2 |
| 919 | // need to be constrained. |
| 920 | using _TMC = _TC<true, _T1, _T2>; |
| 921 | |
| 922 | template<typename _U1, typename _U2, typename |
| 923 | enable_if<_TMC::template |
| 924 | _MoveConstructibleTuple<_U1, _U2>() |
| 925 | && _TMC::template |
| 926 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>() |
| 927 | && !is_same<typename decay<_U1>::type, |
| 928 | allocator_arg_t>::value, |
| 929 | bool>::type = true> |
| 930 | constexpr tuple(_U1&& __a1, _U2&& __a2) |
| 931 | : _Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2)) { } |
| 932 | |
| 933 | template<typename _U1, typename _U2, typename |
| 934 | enable_if<_TMC::template |
| 935 | _MoveConstructibleTuple<_U1, _U2>() |
| 936 | && !_TMC::template |
| 937 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>() |
| 938 | && !is_same<typename decay<_U1>::type, |
| 939 | allocator_arg_t>::value, |
| 940 | bool>::type = false> |
| 941 | explicit constexpr tuple(_U1&& __a1, _U2&& __a2) |
| 942 | : _Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2)) { } |
| 943 | |
| 944 | constexpr tuple(const tuple&) = default; |
| 945 | |
| 946 | constexpr tuple(tuple&&) = default; |
| 947 | |
| 948 | template<typename _U1, typename _U2, typename |
| 949 | enable_if<_TMC::template |
| 950 | _ConstructibleTuple<_U1, _U2>() |
| 951 | && _TMC::template |
| 952 | _ImplicitlyConvertibleTuple<_U1, _U2>(), |
| 953 | bool>::type = true> |
| 954 | constexpr tuple(const tuple<_U1, _U2>& __in) |
| 955 | : _Inherited(static_cast<const _Tuple_impl<0, _U1, _U2>&>(__in)) { } |
| 956 | |
| 957 | template<typename _U1, typename _U2, typename |
| 958 | enable_if<_TMC::template |
| 959 | _ConstructibleTuple<_U1, _U2>() |
| 960 | && !_TMC::template |
| 961 | _ImplicitlyConvertibleTuple<_U1, _U2>(), |
| 962 | bool>::type = false> |
| 963 | explicit constexpr tuple(const tuple<_U1, _U2>& __in) |
| 964 | : _Inherited(static_cast<const _Tuple_impl<0, _U1, _U2>&>(__in)) { } |
| 965 | |
| 966 | template<typename _U1, typename _U2, typename |
| 967 | enable_if<_TMC::template |
| 968 | _MoveConstructibleTuple<_U1, _U2>() |
| 969 | && _TMC::template |
| 970 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 971 | bool>::type = true> |
| 972 | constexpr tuple(tuple<_U1, _U2>&& __in) |
| 973 | : _Inherited(static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) { } |
| 974 | |
| 975 | template<typename _U1, typename _U2, typename |
| 976 | enable_if<_TMC::template |
| 977 | _MoveConstructibleTuple<_U1, _U2>() |
| 978 | && !_TMC::template |
| 979 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 980 | bool>::type = false> |
| 981 | explicit constexpr tuple(tuple<_U1, _U2>&& __in) |
| 982 | : _Inherited(static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) { } |
| 983 | |
| 984 | template<typename _U1, typename _U2, typename |
| 985 | enable_if<_TMC::template |
| 986 | _ConstructibleTuple<_U1, _U2>() |
| 987 | && _TMC::template |
| 988 | _ImplicitlyConvertibleTuple<_U1, _U2>(), |
| 989 | bool>::type = true> |
| 990 | constexpr tuple(const pair<_U1, _U2>& __in) |
| 991 | : _Inherited(__in.first, __in.second) { } |
| 992 | |
| 993 | template<typename _U1, typename _U2, typename |
| 994 | enable_if<_TMC::template |
| 995 | _ConstructibleTuple<_U1, _U2>() |
| 996 | && !_TMC::template |
| 997 | _ImplicitlyConvertibleTuple<_U1, _U2>(), |
| 998 | bool>::type = false> |
| 999 | explicit constexpr tuple(const pair<_U1, _U2>& __in) |
| 1000 | : _Inherited(__in.first, __in.second) { } |
| 1001 | |
| 1002 | template<typename _U1, typename _U2, typename |
| 1003 | enable_if<_TMC::template |
| 1004 | _MoveConstructibleTuple<_U1, _U2>() |
| 1005 | && _TMC::template |
| 1006 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 1007 | bool>::type = true> |
| 1008 | constexpr tuple(pair<_U1, _U2>&& __in) |
| 1009 | : _Inherited(std::forward<_U1>(__in.first), |
| 1010 | std::forward<_U2>(__in.second)) { } |
| 1011 | |
| 1012 | template<typename _U1, typename _U2, typename |
| 1013 | enable_if<_TMC::template |
| 1014 | _MoveConstructibleTuple<_U1, _U2>() |
| 1015 | && !_TMC::template |
| 1016 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 1017 | bool>::type = false> |
| 1018 | explicit constexpr tuple(pair<_U1, _U2>&& __in) |
| 1019 | : _Inherited(std::forward<_U1>(__in.first), |
| 1020 | std::forward<_U2>(__in.second)) { } |
| 1021 | |
| 1022 | // Allocator-extended constructors. |
| 1023 | |
| 1024 | template<typename _Alloc> |
| 1025 | tuple(allocator_arg_t __tag, const _Alloc& __a) |
| 1026 | : _Inherited(__tag, __a) { } |
| 1027 | |
| 1028 | template<typename _Alloc, typename _Dummy = void, |
| 1029 | typename enable_if< |
| 1030 | _TCC<_Dummy>::template |
| 1031 | _ConstructibleTuple<_T1, _T2>() |
| 1032 | && _TCC<_Dummy>::template |
| 1033 | _ImplicitlyConvertibleTuple<_T1, _T2>(), |
| 1034 | bool>::type=true> |
| 1035 | |
| 1036 | tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 1037 | const _T1& __a1, const _T2& __a2) |
| 1038 | : _Inherited(__tag, __a, __a1, __a2) { } |
| 1039 | |
| 1040 | template<typename _Alloc, typename _Dummy = void, |
| 1041 | typename enable_if< |
| 1042 | _TCC<_Dummy>::template |
| 1043 | _ConstructibleTuple<_T1, _T2>() |
| 1044 | && !_TCC<_Dummy>::template |
| 1045 | _ImplicitlyConvertibleTuple<_T1, _T2>(), |
| 1046 | bool>::type=false> |
| 1047 | |
| 1048 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 1049 | const _T1& __a1, const _T2& __a2) |
| 1050 | : _Inherited(__tag, __a, __a1, __a2) { } |
| 1051 | |
| 1052 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1053 | enable_if<_TMC::template |
| 1054 | _MoveConstructibleTuple<_U1, _U2>() |
| 1055 | && _TMC::template |
| 1056 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 1057 | bool>::type = true> |
| 1058 | tuple(allocator_arg_t __tag, const _Alloc& __a, _U1&& __a1, _U2&& __a2) |
| 1059 | : _Inherited(__tag, __a, std::forward<_U1>(__a1), |
| 1060 | std::forward<_U2>(__a2)) { } |
| 1061 | |
| 1062 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1063 | enable_if<_TMC::template |
| 1064 | _MoveConstructibleTuple<_U1, _U2>() |
| 1065 | && !_TMC::template |
| 1066 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 1067 | bool>::type = false> |
| 1068 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 1069 | _U1&& __a1, _U2&& __a2) |
| 1070 | : _Inherited(__tag, __a, std::forward<_U1>(__a1), |
| 1071 | std::forward<_U2>(__a2)) { } |
| 1072 | |
| 1073 | template<typename _Alloc> |
| 1074 | tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in) |
| 1075 | : _Inherited(__tag, __a, static_cast<const _Inherited&>(__in)) { } |
| 1076 | |
| 1077 | template<typename _Alloc> |
| 1078 | tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in) |
| 1079 | : _Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { } |
| 1080 | |
| 1081 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1082 | enable_if<_TMC::template |
| 1083 | _ConstructibleTuple<_U1, _U2>() |
| 1084 | && _TMC::template |
| 1085 | _ImplicitlyConvertibleTuple<_U1, _U2>(), |
| 1086 | bool>::type = true> |
| 1087 | tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 1088 | const tuple<_U1, _U2>& __in) |
| 1089 | : _Inherited(__tag, __a, |
| 1090 | static_cast<const _Tuple_impl<0, _U1, _U2>&>(__in)) |
| 1091 | { } |
| 1092 | |
| 1093 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1094 | enable_if<_TMC::template |
| 1095 | _ConstructibleTuple<_U1, _U2>() |
| 1096 | && !_TMC::template |
| 1097 | _ImplicitlyConvertibleTuple<_U1, _U2>(), |
| 1098 | bool>::type = false> |
| 1099 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 1100 | const tuple<_U1, _U2>& __in) |
| 1101 | : _Inherited(__tag, __a, |
| 1102 | static_cast<const _Tuple_impl<0, _U1, _U2>&>(__in)) |
| 1103 | { } |
| 1104 | |
| 1105 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1106 | enable_if<_TMC::template |
| 1107 | _MoveConstructibleTuple<_U1, _U2>() |
| 1108 | && _TMC::template |
| 1109 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 1110 | bool>::type = true> |
| 1111 | tuple(allocator_arg_t __tag, const _Alloc& __a, tuple<_U1, _U2>&& __in) |
| 1112 | : _Inherited(__tag, __a, static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) |
| 1113 | { } |
| 1114 | |
| 1115 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1116 | enable_if<_TMC::template |
| 1117 | _MoveConstructibleTuple<_U1, _U2>() |
| 1118 | && !_TMC::template |
| 1119 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 1120 | bool>::type = false> |
| 1121 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 1122 | tuple<_U1, _U2>&& __in) |
| 1123 | : _Inherited(__tag, __a, static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) |
| 1124 | { } |
| 1125 | |
| 1126 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1127 | enable_if<_TMC::template |
| 1128 | _ConstructibleTuple<_U1, _U2>() |
| 1129 | && _TMC::template |
| 1130 | _ImplicitlyConvertibleTuple<_U1, _U2>(), |
| 1131 | bool>::type = true> |
| 1132 | tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 1133 | const pair<_U1, _U2>& __in) |
| 1134 | : _Inherited(__tag, __a, __in.first, __in.second) { } |
| 1135 | |
| 1136 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1137 | enable_if<_TMC::template |
| 1138 | _ConstructibleTuple<_U1, _U2>() |
| 1139 | && !_TMC::template |
| 1140 | _ImplicitlyConvertibleTuple<_U1, _U2>(), |
| 1141 | bool>::type = false> |
| 1142 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 1143 | const pair<_U1, _U2>& __in) |
| 1144 | : _Inherited(__tag, __a, __in.first, __in.second) { } |
| 1145 | |
| 1146 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1147 | enable_if<_TMC::template |
| 1148 | _MoveConstructibleTuple<_U1, _U2>() |
| 1149 | && _TMC::template |
| 1150 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 1151 | bool>::type = true> |
| 1152 | tuple(allocator_arg_t __tag, const _Alloc& __a, pair<_U1, _U2>&& __in) |
| 1153 | : _Inherited(__tag, __a, std::forward<_U1>(__in.first), |
| 1154 | std::forward<_U2>(__in.second)) { } |
| 1155 | |
| 1156 | template<typename _Alloc, typename _U1, typename _U2, typename |
| 1157 | enable_if<_TMC::template |
| 1158 | _MoveConstructibleTuple<_U1, _U2>() |
| 1159 | && !_TMC::template |
| 1160 | _ImplicitlyMoveConvertibleTuple<_U1, _U2>(), |
| 1161 | bool>::type = false> |
| 1162 | explicit tuple(allocator_arg_t __tag, const _Alloc& __a, |
| 1163 | pair<_U1, _U2>&& __in) |
| 1164 | : _Inherited(__tag, __a, std::forward<_U1>(__in.first), |
| 1165 | std::forward<_U2>(__in.second)) { } |
| 1166 | |
| 1167 | tuple& |
| 1168 | operator=(const tuple& __in) |
| 1169 | { |
| 1170 | static_cast<_Inherited&>(*this) = __in; |
| 1171 | return *this; |
| 1172 | } |
| 1173 | |
| 1174 | tuple& |
| 1175 | operator=(tuple&& __in) |
| 1176 | noexcept(is_nothrow_move_assignable<_Inherited>::value) |
| 1177 | { |
| 1178 | static_cast<_Inherited&>(*this) = std::move(__in); |
| 1179 | return *this; |
| 1180 | } |
| 1181 | |
| 1182 | template<typename _U1, typename _U2> |
| 1183 | tuple& |
| 1184 | operator=(const tuple<_U1, _U2>& __in) |
| 1185 | { |
| 1186 | static_cast<_Inherited&>(*this) = __in; |
| 1187 | return *this; |
| 1188 | } |
| 1189 | |
| 1190 | template<typename _U1, typename _U2> |
| 1191 | tuple& |
| 1192 | operator=(tuple<_U1, _U2>&& __in) |
| 1193 | { |
| 1194 | static_cast<_Inherited&>(*this) = std::move(__in); |
| 1195 | return *this; |
| 1196 | } |
| 1197 | |
| 1198 | template<typename _U1, typename _U2> |
| 1199 | tuple& |
| 1200 | operator=(const pair<_U1, _U2>& __in) |
| 1201 | { |
| 1202 | this->_M_head(*this) = __in.first; |
| 1203 | this->_M_tail(*this)._M_head(*this) = __in.second; |
| 1204 | return *this; |
| 1205 | } |
| 1206 | |
| 1207 | template<typename _U1, typename _U2> |
| 1208 | tuple& |
| 1209 | operator=(pair<_U1, _U2>&& __in) |
| 1210 | { |
| 1211 | this->_M_head(*this) = std::forward<_U1>(__in.first); |
| 1212 | this->_M_tail(*this)._M_head(*this) = std::forward<_U2>(__in.second); |
| 1213 | return *this; |
| 1214 | } |
| 1215 | |
| 1216 | void |
| 1217 | swap(tuple& __in) |
| 1218 | noexcept(noexcept(__in._M_swap(__in))) |
| 1219 | { _Inherited::_M_swap(__in); } |
| 1220 | }; |
| 1221 | |
| 1222 | |
| 1223 | /** |
| 1224 | * Recursive case for tuple_element: strip off the first element in |
| 1225 | * the tuple and retrieve the (i-1)th element of the remaining tuple. |
| 1226 | */ |
| 1227 | template<std::size_t __i, typename _Head, typename... _Tail> |
| 1228 | struct tuple_element<__i, tuple<_Head, _Tail...> > |
| 1229 | : tuple_element<__i - 1, tuple<_Tail...> > { }; |
| 1230 | |
| 1231 | /** |
| 1232 | * Basis case for tuple_element: The first element is the one we're seeking. |
| 1233 | */ |
| 1234 | template<typename _Head, typename... _Tail> |
| 1235 | struct tuple_element<0, tuple<_Head, _Tail...> > |
| 1236 | { |
| 1237 | typedef _Head type; |
| 1238 | }; |
| 1239 | |
| 1240 | /// class tuple_size |
| 1241 | template<typename... _Elements> |
| 1242 | struct tuple_size<tuple<_Elements...>> |
| 1243 | : public integral_constant<std::size_t, sizeof...(_Elements)> { }; |
| 1244 | |
| 1245 | template<std::size_t __i, typename _Head, typename... _Tail> |
| 1246 | constexpr _Head& |
| 1247 | __get_helper(_Tuple_impl<__i, _Head, _Tail...>& __t) noexcept |
| 1248 | { return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); } |
| 1249 | |
| 1250 | template<std::size_t __i, typename _Head, typename... _Tail> |
| 1251 | constexpr const _Head& |
| 1252 | __get_helper(const _Tuple_impl<__i, _Head, _Tail...>& __t) noexcept |
| 1253 | { return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); } |
| 1254 | |
| 1255 | /// Return a reference to the ith element of a tuple. |
| 1256 | template<std::size_t __i, typename... _Elements> |
| 1257 | constexpr __tuple_element_t<__i, tuple<_Elements...>>& |
| 1258 | get(tuple<_Elements...>& __t) noexcept |
| 1259 | { return std::__get_helper<__i>(__t); } |
| 1260 | |
| 1261 | /// Return a const reference to the ith element of a const tuple. |
| 1262 | template<std::size_t __i, typename... _Elements> |
| 1263 | constexpr const __tuple_element_t<__i, tuple<_Elements...>>& |
| 1264 | get(const tuple<_Elements...>& __t) noexcept |
| 1265 | { return std::__get_helper<__i>(__t); } |
| 1266 | |
| 1267 | /// Return an rvalue reference to the ith element of a tuple rvalue. |
| 1268 | template<std::size_t __i, typename... _Elements> |
| 1269 | constexpr __tuple_element_t<__i, tuple<_Elements...>>&& |
| 1270 | get(tuple<_Elements...>&& __t) noexcept |
| 1271 | { |
| 1272 | typedef __tuple_element_t<__i, tuple<_Elements...>> __element_type; |
| 1273 | return std::forward<__element_type&&>(std::get<__i>(__t)); |
| 1274 | } |
| 1275 | |
| 1276 | #if __cplusplus201402L > 201103L |
| 1277 | |
| 1278 | #define __cpp_lib_tuples_by_type201304 201304 |
| 1279 | |
| 1280 | template<typename _Head, size_t __i, typename... _Tail> |
| 1281 | constexpr _Head& |
| 1282 | __get_helper2(_Tuple_impl<__i, _Head, _Tail...>& __t) noexcept |
| 1283 | { return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); } |
| 1284 | |
| 1285 | template<typename _Head, size_t __i, typename... _Tail> |
| 1286 | constexpr const _Head& |
| 1287 | __get_helper2(const _Tuple_impl<__i, _Head, _Tail...>& __t) noexcept |
| 1288 | { return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); } |
| 1289 | |
| 1290 | /// Return a reference to the unique element of type _Tp of a tuple. |
| 1291 | template <typename _Tp, typename... _Types> |
| 1292 | constexpr _Tp& |
| 1293 | get(tuple<_Types...>& __t) noexcept |
| 1294 | { return std::__get_helper2<_Tp>(__t); } |
| 1295 | |
| 1296 | /// Return a reference to the unique element of type _Tp of a tuple rvalue. |
| 1297 | template <typename _Tp, typename... _Types> |
| 1298 | constexpr _Tp&& |
| 1299 | get(tuple<_Types...>&& __t) noexcept |
| 1300 | { return std::forward<_Tp&&>(std::__get_helper2<_Tp>(__t)); } |
| 1301 | |
| 1302 | /// Return a const reference to the unique element of type _Tp of a tuple. |
| 1303 | template <typename _Tp, typename... _Types> |
| 1304 | constexpr const _Tp& |
| 1305 | get(const tuple<_Types...>& __t) noexcept |
| 1306 | { return std::__get_helper2<_Tp>(__t); } |
| 1307 | #endif |
| 1308 | |
| 1309 | // This class performs the comparison operations on tuples |
| 1310 | template<typename _Tp, typename _Up, size_t __i, size_t __size> |
| 1311 | struct __tuple_compare |
| 1312 | { |
| 1313 | static constexpr bool |
| 1314 | __eq(const _Tp& __t, const _Up& __u) |
| 1315 | { |
| 1316 | return bool(std::get<__i>(__t) == std::get<__i>(__u)) |
| 1317 | && __tuple_compare<_Tp, _Up, __i + 1, __size>::__eq(__t, __u); |
| 1318 | } |
| 1319 | |
| 1320 | static constexpr bool |
| 1321 | __less(const _Tp& __t, const _Up& __u) |
| 1322 | { |
| 1323 | return bool(std::get<__i>(__t) < std::get<__i>(__u)) |
| 1324 | || (!bool(std::get<__i>(__u) < std::get<__i>(__t)) |
| 1325 | && __tuple_compare<_Tp, _Up, __i + 1, __size>::__less(__t, __u)); |
| 1326 | } |
| 1327 | }; |
| 1328 | |
| 1329 | template<typename _Tp, typename _Up, size_t __size> |
| 1330 | struct __tuple_compare<_Tp, _Up, __size, __size> |
| 1331 | { |
| 1332 | static constexpr bool |
| 1333 | __eq(const _Tp&, const _Up&) { return true; } |
| 1334 | |
| 1335 | static constexpr bool |
| 1336 | __less(const _Tp&, const _Up&) { return false; } |
| 1337 | }; |
| 1338 | |
| 1339 | template<typename... _TElements, typename... _UElements> |
| 1340 | constexpr bool |
| 1341 | operator==(const tuple<_TElements...>& __t, |
| 1342 | const tuple<_UElements...>& __u) |
| 1343 | { |
| 1344 | static_assert(sizeof...(_TElements) == sizeof...(_UElements), |
| 1345 | "tuple objects can only be compared if they have equal sizes."); |
| 1346 | using __compare = __tuple_compare<tuple<_TElements...>, |
| 1347 | tuple<_UElements...>, |
| 1348 | 0, sizeof...(_TElements)>; |
| 1349 | return __compare::__eq(__t, __u); |
| 1350 | } |
| 1351 | |
| 1352 | template<typename... _TElements, typename... _UElements> |
| 1353 | constexpr bool |
| 1354 | operator<(const tuple<_TElements...>& __t, |
| 1355 | const tuple<_UElements...>& __u) |
| 1356 | { |
| 1357 | static_assert(sizeof...(_TElements) == sizeof...(_UElements), |
| 1358 | "tuple objects can only be compared if they have equal sizes."); |
| 1359 | using __compare = __tuple_compare<tuple<_TElements...>, |
| 1360 | tuple<_UElements...>, |
| 1361 | 0, sizeof...(_TElements)>; |
| 1362 | return __compare::__less(__t, __u); |
| 1363 | } |
| 1364 | |
| 1365 | template<typename... _TElements, typename... _UElements> |
| 1366 | constexpr bool |
| 1367 | operator!=(const tuple<_TElements...>& __t, |
| 1368 | const tuple<_UElements...>& __u) |
| 1369 | { return !(__t == __u); } |
| 1370 | |
| 1371 | template<typename... _TElements, typename... _UElements> |
| 1372 | constexpr bool |
| 1373 | operator>(const tuple<_TElements...>& __t, |
| 1374 | const tuple<_UElements...>& __u) |
| 1375 | { return __u < __t; } |
| 1376 | |
| 1377 | template<typename... _TElements, typename... _UElements> |
| 1378 | constexpr bool |
| 1379 | operator<=(const tuple<_TElements...>& __t, |
| 1380 | const tuple<_UElements...>& __u) |
| 1381 | { return !(__u < __t); } |
| 1382 | |
| 1383 | template<typename... _TElements, typename... _UElements> |
| 1384 | constexpr bool |
| 1385 | operator>=(const tuple<_TElements...>& __t, |
| 1386 | const tuple<_UElements...>& __u) |
| 1387 | { return !(__t < __u); } |
| 1388 | |
| 1389 | // NB: DR 705. |
| 1390 | template<typename... _Elements> |
| 1391 | constexpr tuple<typename __decay_and_strip<_Elements>::__type...> |
| 1392 | make_tuple(_Elements&&... __args) |
| 1393 | { |
| 1394 | typedef tuple<typename __decay_and_strip<_Elements>::__type...> |
| 1395 | __result_type; |
| 1396 | return __result_type(std::forward<_Elements>(__args)...); |
| 1397 | } |
| 1398 | |
| 1399 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 1400 | // 2275. Why is forward_as_tuple not constexpr? |
| 1401 | template<typename... _Elements> |
| 1402 | constexpr tuple<_Elements&&...> |
| 1403 | forward_as_tuple(_Elements&&... __args) noexcept |
| 1404 | { return tuple<_Elements&&...>(std::forward<_Elements>(__args)...); } |
| 1405 | |
| 1406 | template<typename... _Tps> |
| 1407 | struct __is_tuple_like_impl<tuple<_Tps...>> : true_type |
| 1408 | { }; |
| 1409 | |
| 1410 | // Internal type trait that allows us to sfinae-protect tuple_cat. |
| 1411 | template<typename _Tp> |
| 1412 | struct __is_tuple_like |
| 1413 | : public __is_tuple_like_impl<typename std::remove_cv |
| 1414 | <typename std::remove_reference<_Tp>::type>::type>::type |
| 1415 | { }; |
| 1416 | |
| 1417 | template<size_t, typename, typename, size_t> |
| 1418 | struct __make_tuple_impl; |
| 1419 | |
| 1420 | template<size_t _Idx, typename _Tuple, typename... _Tp, size_t _Nm> |
| 1421 | struct __make_tuple_impl<_Idx, tuple<_Tp...>, _Tuple, _Nm> |
| 1422 | : __make_tuple_impl<_Idx + 1, |
| 1423 | tuple<_Tp..., __tuple_element_t<_Idx, _Tuple>>, |
| 1424 | _Tuple, _Nm> |
| 1425 | { }; |
| 1426 | |
| 1427 | template<std::size_t _Nm, typename _Tuple, typename... _Tp> |
| 1428 | struct __make_tuple_impl<_Nm, tuple<_Tp...>, _Tuple, _Nm> |
| 1429 | { |
| 1430 | typedef tuple<_Tp...> __type; |
| 1431 | }; |
| 1432 | |
| 1433 | template<typename _Tuple> |
| 1434 | struct __do_make_tuple |
| 1435 | : __make_tuple_impl<0, tuple<>, _Tuple, std::tuple_size<_Tuple>::value> |
| 1436 | { }; |
| 1437 | |
| 1438 | // Returns the std::tuple equivalent of a tuple-like type. |
| 1439 | template<typename _Tuple> |
| 1440 | struct __make_tuple |
| 1441 | : public __do_make_tuple<typename std::remove_cv |
| 1442 | <typename std::remove_reference<_Tuple>::type>::type> |
| 1443 | { }; |
| 1444 | |
| 1445 | // Combines several std::tuple's into a single one. |
| 1446 | template<typename...> |
| 1447 | struct __combine_tuples; |
| 1448 | |
| 1449 | template<> |
| 1450 | struct __combine_tuples<> |
| 1451 | { |
| 1452 | typedef tuple<> __type; |
| 1453 | }; |
| 1454 | |
| 1455 | template<typename... _Ts> |
| 1456 | struct __combine_tuples<tuple<_Ts...>> |
| 1457 | { |
| 1458 | typedef tuple<_Ts...> __type; |
| 1459 | }; |
| 1460 | |
| 1461 | template<typename... _T1s, typename... _T2s, typename... _Rem> |
| 1462 | struct __combine_tuples<tuple<_T1s...>, tuple<_T2s...>, _Rem...> |
| 1463 | { |
| 1464 | typedef typename __combine_tuples<tuple<_T1s..., _T2s...>, |
| 1465 | _Rem...>::__type __type; |
| 1466 | }; |
| 1467 | |
| 1468 | // Computes the result type of tuple_cat given a set of tuple-like types. |
| 1469 | template<typename... _Tpls> |
| 1470 | struct __tuple_cat_result |
| 1471 | { |
| 1472 | typedef typename __combine_tuples |
| 1473 | <typename __make_tuple<_Tpls>::__type...>::__type __type; |
| 1474 | }; |
| 1475 | |
| 1476 | // Helper to determine the index set for the first tuple-like |
| 1477 | // type of a given set. |
| 1478 | template<typename...> |
| 1479 | struct __make_1st_indices; |
| 1480 | |
| 1481 | template<> |
| 1482 | struct __make_1st_indices<> |
| 1483 | { |
| 1484 | typedef std::_Index_tuple<> __type; |
| 1485 | }; |
| 1486 | |
| 1487 | template<typename _Tp, typename... _Tpls> |
| 1488 | struct __make_1st_indices<_Tp, _Tpls...> |
| 1489 | { |
| 1490 | typedef typename std::_Build_index_tuple<std::tuple_size< |
| 1491 | typename std::remove_reference<_Tp>::type>::value>::__type __type; |
| 1492 | }; |
| 1493 | |
| 1494 | // Performs the actual concatenation by step-wise expanding tuple-like |
| 1495 | // objects into the elements, which are finally forwarded into the |
| 1496 | // result tuple. |
| 1497 | template<typename _Ret, typename _Indices, typename... _Tpls> |
| 1498 | struct __tuple_concater; |
| 1499 | |
| 1500 | template<typename _Ret, std::size_t... _Is, typename _Tp, typename... _Tpls> |
| 1501 | struct __tuple_concater<_Ret, std::_Index_tuple<_Is...>, _Tp, _Tpls...> |
| 1502 | { |
| 1503 | template<typename... _Us> |
| 1504 | static constexpr _Ret |
| 1505 | _S_do(_Tp&& __tp, _Tpls&&... __tps, _Us&&... __us) |
| 1506 | { |
| 1507 | typedef typename __make_1st_indices<_Tpls...>::__type __idx; |
| 1508 | typedef __tuple_concater<_Ret, __idx, _Tpls...> __next; |
| 1509 | return __next::_S_do(std::forward<_Tpls>(__tps)..., |
| 1510 | std::forward<_Us>(__us)..., |
| 1511 | std::get<_Is>(std::forward<_Tp>(__tp))...); |
| 1512 | } |
| 1513 | }; |
| 1514 | |
| 1515 | template<typename _Ret> |
| 1516 | struct __tuple_concater<_Ret, std::_Index_tuple<>> |
| 1517 | { |
| 1518 | template<typename... _Us> |
| 1519 | static constexpr _Ret |
| 1520 | _S_do(_Us&&... __us) |
| 1521 | { |
| 1522 | return _Ret(std::forward<_Us>(__us)...); |
| 1523 | } |
| 1524 | }; |
| 1525 | |
| 1526 | /// tuple_cat |
| 1527 | template<typename... _Tpls, typename = typename |
| 1528 | enable_if<__and_<__is_tuple_like<_Tpls>...>::value>::type> |
| 1529 | constexpr auto |
| 1530 | tuple_cat(_Tpls&&... __tpls) |
| 1531 | -> typename __tuple_cat_result<_Tpls...>::__type |
| 1532 | { |
| 1533 | typedef typename __tuple_cat_result<_Tpls...>::__type __ret; |
| 1534 | typedef typename __make_1st_indices<_Tpls...>::__type __idx; |
| 1535 | typedef __tuple_concater<__ret, __idx, _Tpls...> __concater; |
| 1536 | return __concater::_S_do(std::forward<_Tpls>(__tpls)...); |
| 1537 | } |
| 1538 | |
| 1539 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 1540 | // 2301. Why is tie not constexpr? |
| 1541 | /// tie |
| 1542 | template<typename... _Elements> |
| 1543 | constexpr tuple<_Elements&...> |
| 1544 | tie(_Elements&... __args) noexcept |
| 1545 | { return tuple<_Elements&...>(__args...); } |
| 1546 | |
| 1547 | /// swap |
| 1548 | template<typename... _Elements> |
| 1549 | inline void |
| 1550 | swap(tuple<_Elements...>& __x, tuple<_Elements...>& __y) |
| 1551 | noexcept(noexcept(__x.swap(__y))) |
| 1552 | { __x.swap(__y); } |
| 1553 | |
| 1554 | // A class (and instance) which can be used in 'tie' when an element |
| 1555 | // of a tuple is not required |
| 1556 | struct _Swallow_assign |
| 1557 | { |
| 1558 | template<class _Tp> |
| 1559 | const _Swallow_assign& |
| 1560 | operator=(const _Tp&) const |
| 1561 | { return *this; } |
| 1562 | }; |
| 1563 | |
| 1564 | const _Swallow_assign ignore{}; |
| 1565 | |
| 1566 | /// Partial specialization for tuples |
| 1567 | template<typename... _Types, typename _Alloc> |
| 1568 | struct uses_allocator<tuple<_Types...>, _Alloc> : true_type { }; |
| 1569 | |
| 1570 | // See stl_pair.h... |
| 1571 | template<class _T1, class _T2> |
| 1572 | template<typename... _Args1, typename... _Args2> |
| 1573 | inline |
| 1574 | pair<_T1, _T2>:: |
| 1575 | pair(piecewise_construct_t, |
| 1576 | tuple<_Args1...> __first, tuple<_Args2...> __second) |
| 1577 | : pair(__first, __second, |
| 1578 | typename _Build_index_tuple<sizeof...(_Args1)>::__type(), |
| 1579 | typename _Build_index_tuple<sizeof...(_Args2)>::__type()) |
| 1580 | { } |
| 1581 | |
| 1582 | template<class _T1, class _T2> |
| 1583 | template<typename... _Args1, std::size_t... _Indexes1, |
| 1584 | typename... _Args2, std::size_t... _Indexes2> |
| 1585 | inline |
| 1586 | pair<_T1, _T2>:: |
| 1587 | pair(tuple<_Args1...>& __tuple1, tuple<_Args2...>& __tuple2, |
| 1588 | _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>) |
| 1589 | : first(std::forward<_Args1>(std::get<_Indexes1>(__tuple1))...), |
| 1590 | second(std::forward<_Args2>(std::get<_Indexes2>(__tuple2))...) |
| 1591 | { } |
| 1592 | |
| 1593 | /// @} |
| 1594 | |
| 1595 | _GLIBCXX_END_NAMESPACE_VERSION |
| 1596 | } // namespace std |
| 1597 | |
| 1598 | #endif // C++11 |
| 1599 | |
| 1600 | #endif // _GLIBCXX_TUPLE |