| //===---- CGBuiltin.cpp - Emit LLVM Code for builtins ---------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This contains code to emit Objective-C code as LLVM code. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CGDebugInfo.h" |
| #include "CGObjCRuntime.h" |
| #include "CodeGenFunction.h" |
| #include "CodeGenModule.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/DeclObjC.h" |
| #include "clang/AST/StmtObjC.h" |
| #include "clang/Basic/Diagnostic.h" |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/Target/TargetData.h" |
| using namespace clang; |
| using namespace CodeGen; |
| |
| /// Emits an instance of NSConstantString representing the object. |
| llvm::Value *CodeGenFunction::EmitObjCStringLiteral(const ObjCStringLiteral *E) |
| { |
| llvm::Constant *C = |
| CGM.getObjCRuntime().GenerateConstantString(E->getString()); |
| // FIXME: This bitcast should just be made an invariant on the Runtime. |
| return llvm::ConstantExpr::getBitCast(C, ConvertType(E->getType())); |
| } |
| |
| /// Emit a selector. |
| llvm::Value *CodeGenFunction::EmitObjCSelectorExpr(const ObjCSelectorExpr *E) { |
| // Untyped selector. |
| // Note that this implementation allows for non-constant strings to be passed |
| // as arguments to @selector(). Currently, the only thing preventing this |
| // behaviour is the type checking in the front end. |
| return CGM.getObjCRuntime().GetSelector(Builder, E->getSelector()); |
| } |
| |
| llvm::Value *CodeGenFunction::EmitObjCProtocolExpr(const ObjCProtocolExpr *E) { |
| // FIXME: This should pass the Decl not the name. |
| return CGM.getObjCRuntime().GenerateProtocolRef(Builder, E->getProtocol()); |
| } |
| |
| |
| RValue CodeGenFunction::EmitObjCMessageExpr(const ObjCMessageExpr *E, |
| ReturnValueSlot Return) { |
| // Only the lookup mechanism and first two arguments of the method |
| // implementation vary between runtimes. We can get the receiver and |
| // arguments in generic code. |
| |
| CGObjCRuntime &Runtime = CGM.getObjCRuntime(); |
| bool isSuperMessage = false; |
| bool isClassMessage = false; |
| ObjCInterfaceDecl *OID = 0; |
| // Find the receiver |
| llvm::Value *Receiver = 0; |
| switch (E->getReceiverKind()) { |
| case ObjCMessageExpr::Instance: |
| Receiver = EmitScalarExpr(E->getInstanceReceiver()); |
| break; |
| |
| case ObjCMessageExpr::Class: { |
| const ObjCObjectType *ObjTy |
| = E->getClassReceiver()->getAs<ObjCObjectType>(); |
| assert(ObjTy && "Invalid Objective-C class message send"); |
| OID = ObjTy->getInterface(); |
| assert(OID && "Invalid Objective-C class message send"); |
| Receiver = Runtime.GetClass(Builder, OID); |
| isClassMessage = true; |
| break; |
| } |
| |
| case ObjCMessageExpr::SuperInstance: |
| Receiver = LoadObjCSelf(); |
| isSuperMessage = true; |
| break; |
| |
| case ObjCMessageExpr::SuperClass: |
| Receiver = LoadObjCSelf(); |
| isSuperMessage = true; |
| isClassMessage = true; |
| break; |
| } |
| |
| CallArgList Args; |
| EmitCallArgs(Args, E->getMethodDecl(), E->arg_begin(), E->arg_end()); |
| |
| QualType ResultType = |
| E->getMethodDecl() ? E->getMethodDecl()->getResultType() : E->getType(); |
| |
| if (isSuperMessage) { |
| // super is only valid in an Objective-C method |
| const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); |
| bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext()); |
| return Runtime.GenerateMessageSendSuper(*this, Return, ResultType, |
| E->getSelector(), |
| OMD->getClassInterface(), |
| isCategoryImpl, |
| Receiver, |
| isClassMessage, |
| Args, |
| E->getMethodDecl()); |
| } |
| |
| return Runtime.GenerateMessageSend(*this, Return, ResultType, |
| E->getSelector(), |
| Receiver, Args, OID, |
| E->getMethodDecl()); |
| } |
| |
| /// StartObjCMethod - Begin emission of an ObjCMethod. This generates |
| /// the LLVM function and sets the other context used by |
| /// CodeGenFunction. |
| void CodeGenFunction::StartObjCMethod(const ObjCMethodDecl *OMD, |
| const ObjCContainerDecl *CD) { |
| FunctionArgList Args; |
| // Check if we should generate debug info for this method. |
| if (CGM.getModuleDebugInfo() && !OMD->hasAttr<NoDebugAttr>()) |
| DebugInfo = CGM.getModuleDebugInfo(); |
| |
| llvm::Function *Fn = CGM.getObjCRuntime().GenerateMethod(OMD, CD); |
| |
| const CGFunctionInfo &FI = CGM.getTypes().getFunctionInfo(OMD); |
| CGM.SetInternalFunctionAttributes(OMD, Fn, FI); |
| |
| Args.push_back(std::make_pair(OMD->getSelfDecl(), |
| OMD->getSelfDecl()->getType())); |
| Args.push_back(std::make_pair(OMD->getCmdDecl(), |
| OMD->getCmdDecl()->getType())); |
| |
| for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(), |
| E = OMD->param_end(); PI != E; ++PI) |
| Args.push_back(std::make_pair(*PI, (*PI)->getType())); |
| |
| CurGD = OMD; |
| |
| StartFunction(OMD, OMD->getResultType(), Fn, Args, OMD->getLocStart()); |
| } |
| |
| void CodeGenFunction::GenerateObjCGetterBody(ObjCIvarDecl *Ivar, |
| bool IsAtomic, bool IsStrong) { |
| LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), |
| Ivar, 0); |
| llvm::Value *GetCopyStructFn = |
| CGM.getObjCRuntime().GetGetStructFunction(); |
| CodeGenTypes &Types = CGM.getTypes(); |
| // objc_copyStruct (ReturnValue, &structIvar, |
| // sizeof (Type of Ivar), isAtomic, false); |
| CallArgList Args; |
| RValue RV = RValue::get(Builder.CreateBitCast(ReturnValue, |
| Types.ConvertType(getContext().VoidPtrTy))); |
| Args.push_back(std::make_pair(RV, getContext().VoidPtrTy)); |
| RV = RValue::get(Builder.CreateBitCast(LV.getAddress(), |
| Types.ConvertType(getContext().VoidPtrTy))); |
| Args.push_back(std::make_pair(RV, getContext().VoidPtrTy)); |
| // sizeof (Type of Ivar) |
| CharUnits Size = getContext().getTypeSizeInChars(Ivar->getType()); |
| llvm::Value *SizeVal = |
| llvm::ConstantInt::get(Types.ConvertType(getContext().LongTy), |
| Size.getQuantity()); |
| Args.push_back(std::make_pair(RValue::get(SizeVal), |
| getContext().LongTy)); |
| llvm::Value *isAtomic = |
| llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), |
| IsAtomic ? 1 : 0); |
| Args.push_back(std::make_pair(RValue::get(isAtomic), |
| getContext().BoolTy)); |
| llvm::Value *hasStrong = |
| llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), |
| IsStrong ? 1 : 0); |
| Args.push_back(std::make_pair(RValue::get(hasStrong), |
| getContext().BoolTy)); |
| EmitCall(Types.getFunctionInfo(getContext().VoidTy, Args, |
| FunctionType::ExtInfo()), |
| GetCopyStructFn, ReturnValueSlot(), Args); |
| } |
| |
| /// Generate an Objective-C method. An Objective-C method is a C function with |
| /// its pointer, name, and types registered in the class struture. |
| void CodeGenFunction::GenerateObjCMethod(const ObjCMethodDecl *OMD) { |
| StartObjCMethod(OMD, OMD->getClassInterface()); |
| EmitStmt(OMD->getBody()); |
| FinishFunction(OMD->getBodyRBrace()); |
| } |
| |
| // FIXME: I wasn't sure about the synthesis approach. If we end up generating an |
| // AST for the whole body we can just fall back to having a GenerateFunction |
| // which takes the body Stmt. |
| |
| /// GenerateObjCGetter - Generate an Objective-C property getter |
| /// function. The given Decl must be an ObjCImplementationDecl. @synthesize |
| /// is illegal within a category. |
| void CodeGenFunction::GenerateObjCGetter(ObjCImplementationDecl *IMP, |
| const ObjCPropertyImplDecl *PID) { |
| ObjCIvarDecl *Ivar = PID->getPropertyIvarDecl(); |
| const ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| bool IsAtomic = |
| !(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic); |
| ObjCMethodDecl *OMD = PD->getGetterMethodDecl(); |
| assert(OMD && "Invalid call to generate getter (empty method)"); |
| StartObjCMethod(OMD, IMP->getClassInterface()); |
| |
| // Determine if we should use an objc_getProperty call for |
| // this. Non-atomic properties are directly evaluated. |
| // atomic 'copy' and 'retain' properties are also directly |
| // evaluated in gc-only mode. |
| if (CGM.getLangOptions().getGCMode() != LangOptions::GCOnly && |
| IsAtomic && |
| (PD->getSetterKind() == ObjCPropertyDecl::Copy || |
| PD->getSetterKind() == ObjCPropertyDecl::Retain)) { |
| llvm::Value *GetPropertyFn = |
| CGM.getObjCRuntime().GetPropertyGetFunction(); |
| |
| if (!GetPropertyFn) { |
| CGM.ErrorUnsupported(PID, "Obj-C getter requiring atomic copy"); |
| FinishFunction(); |
| return; |
| } |
| |
| // Return (ivar-type) objc_getProperty((id) self, _cmd, offset, true). |
| // FIXME: Can't this be simpler? This might even be worse than the |
| // corresponding gcc code. |
| CodeGenTypes &Types = CGM.getTypes(); |
| ValueDecl *Cmd = OMD->getCmdDecl(); |
| llvm::Value *CmdVal = Builder.CreateLoad(LocalDeclMap[Cmd], "cmd"); |
| QualType IdTy = getContext().getObjCIdType(); |
| llvm::Value *SelfAsId = |
| Builder.CreateBitCast(LoadObjCSelf(), Types.ConvertType(IdTy)); |
| llvm::Value *Offset = EmitIvarOffset(IMP->getClassInterface(), Ivar); |
| llvm::Value *True = |
| llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 1); |
| CallArgList Args; |
| Args.push_back(std::make_pair(RValue::get(SelfAsId), IdTy)); |
| Args.push_back(std::make_pair(RValue::get(CmdVal), Cmd->getType())); |
| Args.push_back(std::make_pair(RValue::get(Offset), getContext().LongTy)); |
| Args.push_back(std::make_pair(RValue::get(True), getContext().BoolTy)); |
| // FIXME: We shouldn't need to get the function info here, the |
| // runtime already should have computed it to build the function. |
| RValue RV = EmitCall(Types.getFunctionInfo(PD->getType(), Args, |
| FunctionType::ExtInfo()), |
| GetPropertyFn, ReturnValueSlot(), Args); |
| // We need to fix the type here. Ivars with copy & retain are |
| // always objects so we don't need to worry about complex or |
| // aggregates. |
| RV = RValue::get(Builder.CreateBitCast(RV.getScalarVal(), |
| Types.ConvertType(PD->getType()))); |
| EmitReturnOfRValue(RV, PD->getType()); |
| } else { |
| const llvm::Triple &Triple = getContext().Target.getTriple(); |
| QualType IVART = Ivar->getType(); |
| if (IsAtomic && |
| IVART->isScalarType() && |
| (Triple.getArch() == llvm::Triple::arm || |
| Triple.getArch() == llvm::Triple::thumb) && |
| (getContext().getTypeSizeInChars(IVART) |
| > CharUnits::fromQuantity(4)) && |
| CGM.getObjCRuntime().GetGetStructFunction()) { |
| GenerateObjCGetterBody(Ivar, true, false); |
| } |
| else if (IVART->isAnyComplexType()) { |
| LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), |
| Ivar, 0); |
| ComplexPairTy Pair = LoadComplexFromAddr(LV.getAddress(), |
| LV.isVolatileQualified()); |
| StoreComplexToAddr(Pair, ReturnValue, LV.isVolatileQualified()); |
| } |
| else if (hasAggregateLLVMType(IVART)) { |
| bool IsStrong = false; |
| if ((IsAtomic || (IsStrong = IvarTypeWithAggrGCObjects(IVART))) |
| && CurFnInfo->getReturnInfo().getKind() == ABIArgInfo::Indirect |
| && CGM.getObjCRuntime().GetGetStructFunction()) { |
| GenerateObjCGetterBody(Ivar, IsAtomic, IsStrong); |
| } |
| else { |
| if (PID->getGetterCXXConstructor()) { |
| ReturnStmt *Stmt = |
| new (getContext()) ReturnStmt(SourceLocation(), |
| PID->getGetterCXXConstructor(), |
| 0); |
| EmitReturnStmt(*Stmt); |
| } |
| else { |
| LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), |
| Ivar, 0); |
| EmitAggregateCopy(ReturnValue, LV.getAddress(), IVART); |
| } |
| } |
| } |
| else { |
| LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), |
| Ivar, 0); |
| CodeGenTypes &Types = CGM.getTypes(); |
| RValue RV = EmitLoadOfLValue(LV, IVART); |
| RV = RValue::get(Builder.CreateBitCast(RV.getScalarVal(), |
| Types.ConvertType(PD->getType()))); |
| EmitReturnOfRValue(RV, PD->getType()); |
| } |
| } |
| |
| FinishFunction(); |
| } |
| |
| void CodeGenFunction::GenerateObjCAtomicSetterBody(ObjCMethodDecl *OMD, |
| ObjCIvarDecl *Ivar) { |
| // objc_copyStruct (&structIvar, &Arg, |
| // sizeof (struct something), true, false); |
| llvm::Value *GetCopyStructFn = |
| CGM.getObjCRuntime().GetSetStructFunction(); |
| CodeGenTypes &Types = CGM.getTypes(); |
| CallArgList Args; |
| LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), Ivar, 0); |
| RValue RV = |
| RValue::get(Builder.CreateBitCast(LV.getAddress(), |
| Types.ConvertType(getContext().VoidPtrTy))); |
| Args.push_back(std::make_pair(RV, getContext().VoidPtrTy)); |
| llvm::Value *Arg = LocalDeclMap[*OMD->param_begin()]; |
| llvm::Value *ArgAsPtrTy = |
| Builder.CreateBitCast(Arg, |
| Types.ConvertType(getContext().VoidPtrTy)); |
| RV = RValue::get(ArgAsPtrTy); |
| Args.push_back(std::make_pair(RV, getContext().VoidPtrTy)); |
| // sizeof (Type of Ivar) |
| CharUnits Size = getContext().getTypeSizeInChars(Ivar->getType()); |
| llvm::Value *SizeVal = |
| llvm::ConstantInt::get(Types.ConvertType(getContext().LongTy), |
| Size.getQuantity()); |
| Args.push_back(std::make_pair(RValue::get(SizeVal), |
| getContext().LongTy)); |
| llvm::Value *True = |
| llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 1); |
| Args.push_back(std::make_pair(RValue::get(True), getContext().BoolTy)); |
| llvm::Value *False = |
| llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 0); |
| Args.push_back(std::make_pair(RValue::get(False), getContext().BoolTy)); |
| EmitCall(Types.getFunctionInfo(getContext().VoidTy, Args, |
| FunctionType::ExtInfo()), |
| GetCopyStructFn, ReturnValueSlot(), Args); |
| } |
| |
| /// GenerateObjCSetter - Generate an Objective-C property setter |
| /// function. The given Decl must be an ObjCImplementationDecl. @synthesize |
| /// is illegal within a category. |
| void CodeGenFunction::GenerateObjCSetter(ObjCImplementationDecl *IMP, |
| const ObjCPropertyImplDecl *PID) { |
| ObjCIvarDecl *Ivar = PID->getPropertyIvarDecl(); |
| const ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| ObjCMethodDecl *OMD = PD->getSetterMethodDecl(); |
| assert(OMD && "Invalid call to generate setter (empty method)"); |
| StartObjCMethod(OMD, IMP->getClassInterface()); |
| |
| bool IsCopy = PD->getSetterKind() == ObjCPropertyDecl::Copy; |
| bool IsAtomic = |
| !(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic); |
| |
| // Determine if we should use an objc_setProperty call for |
| // this. Properties with 'copy' semantics always use it, as do |
| // non-atomic properties with 'release' semantics as long as we are |
| // not in gc-only mode. |
| if (IsCopy || |
| (CGM.getLangOptions().getGCMode() != LangOptions::GCOnly && |
| PD->getSetterKind() == ObjCPropertyDecl::Retain)) { |
| llvm::Value *SetPropertyFn = |
| CGM.getObjCRuntime().GetPropertySetFunction(); |
| |
| if (!SetPropertyFn) { |
| CGM.ErrorUnsupported(PID, "Obj-C getter requiring atomic copy"); |
| FinishFunction(); |
| return; |
| } |
| |
| // Emit objc_setProperty((id) self, _cmd, offset, arg, |
| // <is-atomic>, <is-copy>). |
| // FIXME: Can't this be simpler? This might even be worse than the |
| // corresponding gcc code. |
| CodeGenTypes &Types = CGM.getTypes(); |
| ValueDecl *Cmd = OMD->getCmdDecl(); |
| llvm::Value *CmdVal = Builder.CreateLoad(LocalDeclMap[Cmd], "cmd"); |
| QualType IdTy = getContext().getObjCIdType(); |
| llvm::Value *SelfAsId = |
| Builder.CreateBitCast(LoadObjCSelf(), Types.ConvertType(IdTy)); |
| llvm::Value *Offset = EmitIvarOffset(IMP->getClassInterface(), Ivar); |
| llvm::Value *Arg = LocalDeclMap[*OMD->param_begin()]; |
| llvm::Value *ArgAsId = |
| Builder.CreateBitCast(Builder.CreateLoad(Arg, "arg"), |
| Types.ConvertType(IdTy)); |
| llvm::Value *True = |
| llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 1); |
| llvm::Value *False = |
| llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 0); |
| CallArgList Args; |
| Args.push_back(std::make_pair(RValue::get(SelfAsId), IdTy)); |
| Args.push_back(std::make_pair(RValue::get(CmdVal), Cmd->getType())); |
| Args.push_back(std::make_pair(RValue::get(Offset), getContext().LongTy)); |
| Args.push_back(std::make_pair(RValue::get(ArgAsId), IdTy)); |
| Args.push_back(std::make_pair(RValue::get(IsAtomic ? True : False), |
| getContext().BoolTy)); |
| Args.push_back(std::make_pair(RValue::get(IsCopy ? True : False), |
| getContext().BoolTy)); |
| // FIXME: We shouldn't need to get the function info here, the runtime |
| // already should have computed it to build the function. |
| EmitCall(Types.getFunctionInfo(getContext().VoidTy, Args, |
| FunctionType::ExtInfo()), |
| SetPropertyFn, |
| ReturnValueSlot(), Args); |
| } else if (IsAtomic && hasAggregateLLVMType(Ivar->getType()) && |
| !Ivar->getType()->isAnyComplexType() && |
| IndirectObjCSetterArg(*CurFnInfo) |
| && CGM.getObjCRuntime().GetSetStructFunction()) { |
| // objc_copyStruct (&structIvar, &Arg, |
| // sizeof (struct something), true, false); |
| GenerateObjCAtomicSetterBody(OMD, Ivar); |
| } else if (PID->getSetterCXXAssignment()) { |
| EmitIgnoredExpr(PID->getSetterCXXAssignment()); |
| } else { |
| const llvm::Triple &Triple = getContext().Target.getTriple(); |
| QualType IVART = Ivar->getType(); |
| if (IsAtomic && |
| IVART->isScalarType() && |
| (Triple.getArch() == llvm::Triple::arm || |
| Triple.getArch() == llvm::Triple::thumb) && |
| (getContext().getTypeSizeInChars(IVART) |
| > CharUnits::fromQuantity(4)) && |
| CGM.getObjCRuntime().GetGetStructFunction()) { |
| GenerateObjCAtomicSetterBody(OMD, Ivar); |
| } |
| else { |
| // FIXME: Find a clean way to avoid AST node creation. |
| SourceLocation Loc = PD->getLocation(); |
| ValueDecl *Self = OMD->getSelfDecl(); |
| ObjCIvarDecl *Ivar = PID->getPropertyIvarDecl(); |
| DeclRefExpr Base(Self, Self->getType(), VK_RValue, Loc); |
| ParmVarDecl *ArgDecl = *OMD->param_begin(); |
| DeclRefExpr Arg(ArgDecl, ArgDecl->getType(), VK_LValue, Loc); |
| ObjCIvarRefExpr IvarRef(Ivar, Ivar->getType(), Loc, &Base, true, true); |
| |
| // The property type can differ from the ivar type in some situations with |
| // Objective-C pointer types, we can always bit cast the RHS in these cases. |
| if (getContext().getCanonicalType(Ivar->getType()) != |
| getContext().getCanonicalType(ArgDecl->getType())) { |
| ImplicitCastExpr ArgCasted(ImplicitCastExpr::OnStack, |
| Ivar->getType(), CK_BitCast, &Arg, |
| VK_RValue); |
| BinaryOperator Assign(&IvarRef, &ArgCasted, BO_Assign, |
| Ivar->getType(), VK_RValue, OK_Ordinary, Loc); |
| EmitStmt(&Assign); |
| } else { |
| BinaryOperator Assign(&IvarRef, &Arg, BO_Assign, |
| Ivar->getType(), VK_RValue, OK_Ordinary, Loc); |
| EmitStmt(&Assign); |
| } |
| } |
| } |
| |
| FinishFunction(); |
| } |
| |
| void CodeGenFunction::GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP, |
| ObjCMethodDecl *MD, |
| bool ctor) { |
| llvm::SmallVector<CXXCtorInitializer *, 8> IvarInitializers; |
| MD->createImplicitParams(CGM.getContext(), IMP->getClassInterface()); |
| StartObjCMethod(MD, IMP->getClassInterface()); |
| for (ObjCImplementationDecl::init_const_iterator B = IMP->init_begin(), |
| E = IMP->init_end(); B != E; ++B) { |
| CXXCtorInitializer *Member = (*B); |
| IvarInitializers.push_back(Member); |
| } |
| if (ctor) { |
| for (unsigned I = 0, E = IvarInitializers.size(); I != E; ++I) { |
| CXXCtorInitializer *IvarInit = IvarInitializers[I]; |
| FieldDecl *Field = IvarInit->getAnyMember(); |
| ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(Field); |
| LValue LV = EmitLValueForIvar(TypeOfSelfObject(), |
| LoadObjCSelf(), Ivar, 0); |
| EmitAggExpr(IvarInit->getInit(), AggValueSlot::forLValue(LV, true)); |
| } |
| // constructor returns 'self'. |
| CodeGenTypes &Types = CGM.getTypes(); |
| QualType IdTy(CGM.getContext().getObjCIdType()); |
| llvm::Value *SelfAsId = |
| Builder.CreateBitCast(LoadObjCSelf(), Types.ConvertType(IdTy)); |
| EmitReturnOfRValue(RValue::get(SelfAsId), IdTy); |
| } else { |
| // dtor |
| for (size_t i = IvarInitializers.size(); i > 0; --i) { |
| FieldDecl *Field = IvarInitializers[i - 1]->getAnyMember(); |
| QualType FieldType = Field->getType(); |
| const ConstantArrayType *Array = |
| getContext().getAsConstantArrayType(FieldType); |
| if (Array) |
| FieldType = getContext().getBaseElementType(FieldType); |
| |
| ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(Field); |
| LValue LV = EmitLValueForIvar(TypeOfSelfObject(), |
| LoadObjCSelf(), Ivar, 0); |
| const RecordType *RT = FieldType->getAs<RecordType>(); |
| CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl()); |
| CXXDestructorDecl *Dtor = FieldClassDecl->getDestructor(); |
| if (!Dtor->isTrivial()) { |
| if (Array) { |
| const llvm::Type *BasePtr = ConvertType(FieldType); |
| BasePtr = llvm::PointerType::getUnqual(BasePtr); |
| llvm::Value *BaseAddrPtr = |
| Builder.CreateBitCast(LV.getAddress(), BasePtr); |
| EmitCXXAggrDestructorCall(Dtor, |
| Array, BaseAddrPtr); |
| } else { |
| EmitCXXDestructorCall(Dtor, |
| Dtor_Complete, /*ForVirtualBase=*/false, |
| LV.getAddress()); |
| } |
| } |
| } |
| } |
| FinishFunction(); |
| } |
| |
| bool CodeGenFunction::IndirectObjCSetterArg(const CGFunctionInfo &FI) { |
| CGFunctionInfo::const_arg_iterator it = FI.arg_begin(); |
| it++; it++; |
| const ABIArgInfo &AI = it->info; |
| // FIXME. Is this sufficient check? |
| return (AI.getKind() == ABIArgInfo::Indirect); |
| } |
| |
| bool CodeGenFunction::IvarTypeWithAggrGCObjects(QualType Ty) { |
| if (CGM.getLangOptions().getGCMode() == LangOptions::NonGC) |
| return false; |
| if (const RecordType *FDTTy = Ty.getTypePtr()->getAs<RecordType>()) |
| return FDTTy->getDecl()->hasObjectMember(); |
| return false; |
| } |
| |
| llvm::Value *CodeGenFunction::LoadObjCSelf() { |
| const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); |
| return Builder.CreateLoad(LocalDeclMap[OMD->getSelfDecl()], "self"); |
| } |
| |
| QualType CodeGenFunction::TypeOfSelfObject() { |
| const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); |
| ImplicitParamDecl *selfDecl = OMD->getSelfDecl(); |
| const ObjCObjectPointerType *PTy = cast<ObjCObjectPointerType>( |
| getContext().getCanonicalType(selfDecl->getType())); |
| return PTy->getPointeeType(); |
| } |
| |
| LValue |
| CodeGenFunction::EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E) { |
| // This is a special l-value that just issues sends when we load or |
| // store through it. |
| |
| // For certain base kinds, we need to emit the base immediately. |
| llvm::Value *Base; |
| if (E->isSuperReceiver()) |
| Base = LoadObjCSelf(); |
| else if (E->isClassReceiver()) |
| Base = CGM.getObjCRuntime().GetClass(Builder, E->getClassReceiver()); |
| else |
| Base = EmitScalarExpr(E->getBase()); |
| return LValue::MakePropertyRef(E, Base); |
| } |
| |
| static RValue GenerateMessageSendSuper(CodeGenFunction &CGF, |
| ReturnValueSlot Return, |
| QualType ResultType, |
| Selector S, |
| llvm::Value *Receiver, |
| const CallArgList &CallArgs) { |
| const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CGF.CurFuncDecl); |
| bool isClassMessage = OMD->isClassMethod(); |
| bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext()); |
| return CGF.CGM.getObjCRuntime() |
| .GenerateMessageSendSuper(CGF, Return, ResultType, |
| S, OMD->getClassInterface(), |
| isCategoryImpl, Receiver, |
| isClassMessage, CallArgs); |
| } |
| |
| RValue CodeGenFunction::EmitLoadOfPropertyRefLValue(LValue LV, |
| ReturnValueSlot Return) { |
| const ObjCPropertyRefExpr *E = LV.getPropertyRefExpr(); |
| QualType ResultType; |
| Selector S; |
| if (E->isExplicitProperty()) { |
| const ObjCPropertyDecl *Property = E->getExplicitProperty(); |
| S = Property->getGetterName(); |
| ResultType = E->getType(); |
| } else { |
| const ObjCMethodDecl *Getter = E->getImplicitPropertyGetter(); |
| S = Getter->getSelector(); |
| ResultType = Getter->getResultType(); // with reference! |
| } |
| |
| llvm::Value *Receiver = LV.getPropertyRefBaseAddr(); |
| |
| // Accesses to 'super' follow a different code path. |
| if (E->isSuperReceiver()) |
| return GenerateMessageSendSuper(*this, Return, ResultType, |
| S, Receiver, CallArgList()); |
| |
| const ObjCInterfaceDecl *ReceiverClass |
| = (E->isClassReceiver() ? E->getClassReceiver() : 0); |
| return CGM.getObjCRuntime(). |
| GenerateMessageSend(*this, Return, ResultType, S, |
| Receiver, CallArgList(), ReceiverClass); |
| } |
| |
| void CodeGenFunction::EmitStoreThroughPropertyRefLValue(RValue Src, |
| LValue Dst) { |
| const ObjCPropertyRefExpr *E = Dst.getPropertyRefExpr(); |
| Selector S = E->getSetterSelector(); |
| QualType ArgType; |
| if (E->isImplicitProperty()) { |
| const ObjCMethodDecl *Setter = E->getImplicitPropertySetter(); |
| ObjCMethodDecl::param_iterator P = Setter->param_begin(); |
| ArgType = (*P)->getType(); |
| } else { |
| ArgType = E->getType(); |
| } |
| // FIXME. Other than scalars, AST is not adequate for setter and |
| // getter type mismatches which require conversion. |
| if (Src.isScalar()) { |
| llvm::Value *SrcVal = Src.getScalarVal(); |
| QualType DstType = getContext().getCanonicalType(ArgType); |
| const llvm::Type *DstTy = ConvertType(DstType); |
| if (SrcVal->getType() != DstTy) |
| Src = |
| RValue::get(EmitScalarConversion(SrcVal, E->getType(), DstType)); |
| } |
| |
| CallArgList Args; |
| Args.push_back(std::make_pair(Src, ArgType)); |
| |
| llvm::Value *Receiver = Dst.getPropertyRefBaseAddr(); |
| QualType ResultType = getContext().VoidTy; |
| |
| if (E->isSuperReceiver()) { |
| GenerateMessageSendSuper(*this, ReturnValueSlot(), |
| ResultType, S, Receiver, Args); |
| return; |
| } |
| |
| const ObjCInterfaceDecl *ReceiverClass |
| = (E->isClassReceiver() ? E->getClassReceiver() : 0); |
| |
| CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), |
| ResultType, S, Receiver, Args, |
| ReceiverClass); |
| } |
| |
| void CodeGenFunction::EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S){ |
| llvm::Constant *EnumerationMutationFn = |
| CGM.getObjCRuntime().EnumerationMutationFunction(); |
| |
| if (!EnumerationMutationFn) { |
| CGM.ErrorUnsupported(&S, "Obj-C fast enumeration for this runtime"); |
| return; |
| } |
| |
| // The local variable comes into scope immediately. |
| AutoVarEmission variable = AutoVarEmission::invalid(); |
| if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) |
| variable = EmitAutoVarAlloca(*cast<VarDecl>(SD->getSingleDecl())); |
| |
| CGDebugInfo *DI = getDebugInfo(); |
| if (DI) { |
| DI->setLocation(S.getSourceRange().getBegin()); |
| DI->EmitRegionStart(Builder); |
| } |
| |
| JumpDest LoopEnd = getJumpDestInCurrentScope("forcoll.end"); |
| JumpDest AfterBody = getJumpDestInCurrentScope("forcoll.next"); |
| |
| // Fast enumeration state. |
| QualType StateTy = getContext().getObjCFastEnumerationStateType(); |
| llvm::Value *StatePtr = CreateMemTemp(StateTy, "state.ptr"); |
| EmitNullInitialization(StatePtr, StateTy); |
| |
| // Number of elements in the items array. |
| static const unsigned NumItems = 16; |
| |
| // Fetch the countByEnumeratingWithState:objects:count: selector. |
| IdentifierInfo *II[] = { |
| &CGM.getContext().Idents.get("countByEnumeratingWithState"), |
| &CGM.getContext().Idents.get("objects"), |
| &CGM.getContext().Idents.get("count") |
| }; |
| Selector FastEnumSel = |
| CGM.getContext().Selectors.getSelector(llvm::array_lengthof(II), &II[0]); |
| |
| QualType ItemsTy = |
| getContext().getConstantArrayType(getContext().getObjCIdType(), |
| llvm::APInt(32, NumItems), |
| ArrayType::Normal, 0); |
| llvm::Value *ItemsPtr = CreateMemTemp(ItemsTy, "items.ptr"); |
| |
| // Emit the collection pointer. |
| llvm::Value *Collection = EmitScalarExpr(S.getCollection()); |
| |
| // Send it our message: |
| CallArgList Args; |
| |
| // The first argument is a temporary of the enumeration-state type. |
| Args.push_back(std::make_pair(RValue::get(StatePtr), |
| getContext().getPointerType(StateTy))); |
| |
| // The second argument is a temporary array with space for NumItems |
| // pointers. We'll actually be loading elements from the array |
| // pointer written into the control state; this buffer is so that |
| // collections that *aren't* backed by arrays can still queue up |
| // batches of elements. |
| Args.push_back(std::make_pair(RValue::get(ItemsPtr), |
| getContext().getPointerType(ItemsTy))); |
| |
| // The third argument is the capacity of that temporary array. |
| const llvm::Type *UnsignedLongLTy = ConvertType(getContext().UnsignedLongTy); |
| llvm::Constant *Count = llvm::ConstantInt::get(UnsignedLongLTy, NumItems); |
| Args.push_back(std::make_pair(RValue::get(Count), |
| getContext().UnsignedLongTy)); |
| |
| // Start the enumeration. |
| RValue CountRV = |
| CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), |
| getContext().UnsignedLongTy, |
| FastEnumSel, |
| Collection, Args); |
| |
| // The initial number of objects that were returned in the buffer. |
| llvm::Value *initialBufferLimit = CountRV.getScalarVal(); |
| |
| llvm::BasicBlock *EmptyBB = createBasicBlock("forcoll.empty"); |
| llvm::BasicBlock *LoopInitBB = createBasicBlock("forcoll.loopinit"); |
| |
| llvm::Value *zero = llvm::Constant::getNullValue(UnsignedLongLTy); |
| |
| // If the limit pointer was zero to begin with, the collection is |
| // empty; skip all this. |
| Builder.CreateCondBr(Builder.CreateICmpEQ(initialBufferLimit, zero, "iszero"), |
| EmptyBB, LoopInitBB); |
| |
| // Otherwise, initialize the loop. |
| EmitBlock(LoopInitBB); |
| |
| // Save the initial mutations value. This is the value at an |
| // address that was written into the state object by |
| // countByEnumeratingWithState:objects:count:. |
| llvm::Value *StateMutationsPtrPtr = |
| Builder.CreateStructGEP(StatePtr, 2, "mutationsptr.ptr"); |
| llvm::Value *StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, |
| "mutationsptr"); |
| |
| llvm::Value *initialMutations = |
| Builder.CreateLoad(StateMutationsPtr, "forcoll.initial-mutations"); |
| |
| // Start looping. This is the point we return to whenever we have a |
| // fresh, non-empty batch of objects. |
| llvm::BasicBlock *LoopBodyBB = createBasicBlock("forcoll.loopbody"); |
| EmitBlock(LoopBodyBB); |
| |
| // The current index into the buffer. |
| llvm::PHINode *index = Builder.CreatePHI(UnsignedLongLTy, "forcoll.index"); |
| index->addIncoming(zero, LoopInitBB); |
| |
| // The current buffer size. |
| llvm::PHINode *count = Builder.CreatePHI(UnsignedLongLTy, "forcoll.count"); |
| count->addIncoming(initialBufferLimit, LoopInitBB); |
| |
| // Check whether the mutations value has changed from where it was |
| // at start. StateMutationsPtr should actually be invariant between |
| // refreshes. |
| StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, "mutationsptr"); |
| llvm::Value *currentMutations |
| = Builder.CreateLoad(StateMutationsPtr, "statemutations"); |
| |
| llvm::BasicBlock *WasMutatedBB = createBasicBlock("forcoll.mutated"); |
| llvm::BasicBlock *WasNotMutatedBB = createBasicBlock("forcoll.notmutated"); |
| |
| Builder.CreateCondBr(Builder.CreateICmpEQ(currentMutations, initialMutations), |
| WasNotMutatedBB, WasMutatedBB); |
| |
| // If so, call the enumeration-mutation function. |
| EmitBlock(WasMutatedBB); |
| llvm::Value *V = |
| Builder.CreateBitCast(Collection, |
| ConvertType(getContext().getObjCIdType()), |
| "tmp"); |
| CallArgList Args2; |
| Args2.push_back(std::make_pair(RValue::get(V), |
| getContext().getObjCIdType())); |
| // FIXME: We shouldn't need to get the function info here, the runtime already |
| // should have computed it to build the function. |
| EmitCall(CGM.getTypes().getFunctionInfo(getContext().VoidTy, Args2, |
| FunctionType::ExtInfo()), |
| EnumerationMutationFn, ReturnValueSlot(), Args2); |
| |
| // Otherwise, or if the mutation function returns, just continue. |
| EmitBlock(WasNotMutatedBB); |
| |
| // Initialize the element variable. |
| RunCleanupsScope elementVariableScope(*this); |
| bool elementIsVariable; |
| LValue elementLValue; |
| QualType elementType; |
| if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) { |
| // Initialize the variable, in case it's a __block variable or something. |
| EmitAutoVarInit(variable); |
| |
| const VarDecl* D = cast<VarDecl>(SD->getSingleDecl()); |
| DeclRefExpr tempDRE(const_cast<VarDecl*>(D), D->getType(), |
| VK_LValue, SourceLocation()); |
| elementLValue = EmitLValue(&tempDRE); |
| elementType = D->getType(); |
| elementIsVariable = true; |
| } else { |
| elementLValue = LValue(); // suppress warning |
| elementType = cast<Expr>(S.getElement())->getType(); |
| elementIsVariable = false; |
| } |
| const llvm::Type *convertedElementType = ConvertType(elementType); |
| |
| // Fetch the buffer out of the enumeration state. |
| // TODO: this pointer should actually be invariant between |
| // refreshes, which would help us do certain loop optimizations. |
| llvm::Value *StateItemsPtr = |
| Builder.CreateStructGEP(StatePtr, 1, "stateitems.ptr"); |
| llvm::Value *EnumStateItems = |
| Builder.CreateLoad(StateItemsPtr, "stateitems"); |
| |
| // Fetch the value at the current index from the buffer. |
| llvm::Value *CurrentItemPtr = |
| Builder.CreateGEP(EnumStateItems, index, "currentitem.ptr"); |
| llvm::Value *CurrentItem = Builder.CreateLoad(CurrentItemPtr); |
| |
| // Cast that value to the right type. |
| CurrentItem = Builder.CreateBitCast(CurrentItem, convertedElementType, |
| "currentitem"); |
| |
| // Make sure we have an l-value. Yes, this gets evaluated every |
| // time through the loop. |
| if (!elementIsVariable) |
| elementLValue = EmitLValue(cast<Expr>(S.getElement())); |
| |
| EmitStoreThroughLValue(RValue::get(CurrentItem), elementLValue, elementType); |
| |
| // If we do have an element variable, this assignment is the end of |
| // its initialization. |
| if (elementIsVariable) |
| EmitAutoVarCleanups(variable); |
| |
| // Perform the loop body, setting up break and continue labels. |
| BreakContinueStack.push_back(BreakContinue(LoopEnd, AfterBody)); |
| { |
| RunCleanupsScope Scope(*this); |
| EmitStmt(S.getBody()); |
| } |
| BreakContinueStack.pop_back(); |
| |
| // Destroy the element variable now. |
| elementVariableScope.ForceCleanup(); |
| |
| // Check whether there are more elements. |
| EmitBlock(AfterBody.getBlock()); |
| |
| llvm::BasicBlock *FetchMoreBB = createBasicBlock("forcoll.refetch"); |
| |
| // First we check in the local buffer. |
| llvm::Value *indexPlusOne |
| = Builder.CreateAdd(index, llvm::ConstantInt::get(UnsignedLongLTy, 1)); |
| |
| // If we haven't overrun the buffer yet, we can continue. |
| Builder.CreateCondBr(Builder.CreateICmpULT(indexPlusOne, count), |
| LoopBodyBB, FetchMoreBB); |
| |
| index->addIncoming(indexPlusOne, AfterBody.getBlock()); |
| count->addIncoming(count, AfterBody.getBlock()); |
| |
| // Otherwise, we have to fetch more elements. |
| EmitBlock(FetchMoreBB); |
| |
| CountRV = |
| CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), |
| getContext().UnsignedLongTy, |
| FastEnumSel, |
| Collection, Args); |
| |
| // If we got a zero count, we're done. |
| llvm::Value *refetchCount = CountRV.getScalarVal(); |
| |
| // (note that the message send might split FetchMoreBB) |
| index->addIncoming(zero, Builder.GetInsertBlock()); |
| count->addIncoming(refetchCount, Builder.GetInsertBlock()); |
| |
| Builder.CreateCondBr(Builder.CreateICmpEQ(refetchCount, zero), |
| EmptyBB, LoopBodyBB); |
| |
| // No more elements. |
| EmitBlock(EmptyBB); |
| |
| if (!elementIsVariable) { |
| // If the element was not a declaration, set it to be null. |
| |
| llvm::Value *null = llvm::Constant::getNullValue(convertedElementType); |
| elementLValue = EmitLValue(cast<Expr>(S.getElement())); |
| EmitStoreThroughLValue(RValue::get(null), elementLValue, elementType); |
| } |
| |
| if (DI) { |
| DI->setLocation(S.getSourceRange().getEnd()); |
| DI->EmitRegionEnd(Builder); |
| } |
| |
| EmitBlock(LoopEnd.getBlock()); |
| } |
| |
| void CodeGenFunction::EmitObjCAtTryStmt(const ObjCAtTryStmt &S) { |
| CGM.getObjCRuntime().EmitTryStmt(*this, S); |
| } |
| |
| void CodeGenFunction::EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S) { |
| CGM.getObjCRuntime().EmitThrowStmt(*this, S); |
| } |
| |
| void CodeGenFunction::EmitObjCAtSynchronizedStmt( |
| const ObjCAtSynchronizedStmt &S) { |
| CGM.getObjCRuntime().EmitSynchronizedStmt(*this, S); |
| } |
| |
| CGObjCRuntime::~CGObjCRuntime() {} |