| //===---- 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 "CGObjCRuntime.h" |
| #include "CodeGenFunction.h" |
| #include "CodeGenModule.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/DeclObjC.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); |
| // 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) { |
| // 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(); |
| const Expr *ReceiverExpr = E->getReceiver(); |
| bool isSuperMessage = false; |
| bool isClassMessage = false; |
| // Find the receiver |
| llvm::Value *Receiver; |
| if (!ReceiverExpr) { |
| const ObjCInterfaceDecl *OID = E->getClassInfo().first; |
| |
| // Very special case, super send in class method. The receiver is |
| // self (the class object) and the send uses super semantics. |
| if (!OID) { |
| assert(E->getClassName()->isStr("super") && |
| "Unexpected missing class interface in message send."); |
| isSuperMessage = true; |
| Receiver = LoadObjCSelf(); |
| } else { |
| Receiver = Runtime.GetClass(Builder, OID); |
| } |
| |
| isClassMessage = true; |
| } else if (isa<ObjCSuperExpr>(E->getReceiver())) { |
| isSuperMessage = true; |
| Receiver = LoadObjCSelf(); |
| } else { |
| Receiver = EmitScalarExpr(E->getReceiver()); |
| } |
| |
| // FIXME: This should use EmitCallArgs. |
| CallArgList Args; |
| for (CallExpr::const_arg_iterator i = E->arg_begin(), e = E->arg_end(); |
| i != e; ++i) |
| Args.push_back(std::make_pair(EmitAnyExprToTemp(*i), (*i)->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, E->getType(), |
| E->getSelector(), |
| OMD->getClassInterface(), |
| isCategoryImpl, |
| Receiver, |
| isClassMessage, |
| Args); |
| } |
| return Runtime.GenerateMessageSend(*this, E->getType(), E->getSelector(), |
| Receiver, isClassMessage, Args); |
| } |
| |
| /// 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; |
| llvm::Function *Fn = CGM.getObjCRuntime().GenerateMethod(OMD, CD); |
| |
| CGM.SetMethodAttributes(OMD, Fn); |
| |
| 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())); |
| |
| StartFunction(OMD, OMD->getResultType(), Fn, Args, OMD->getLocEnd()); |
| } |
| |
| /// 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) { |
| // Check if we should generate debug info for this method. |
| if (CGM.getDebugInfo() && !OMD->hasAttr<NodebugAttr>()) |
| DebugInfo = CGM.getDebugInfo(); |
| StartObjCMethod(OMD, OMD->getClassInterface()); |
| EmitStmt(OMD->getBody()); |
| FinishFunction(cast<CompoundStmt>(OMD->getBody())->getRBracLoc()); |
| } |
| |
| // 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(); |
| ObjCMethodDecl *OMD = PD->getGetterMethodDecl(); |
| assert(OMD && "Invalid call to generate getter (empty method)"); |
| // FIXME: This is rather murky, we create this here since they will |
| // not have been created by Sema for us. |
| OMD->createImplicitParams(getContext(), IMP->getClassInterface()); |
| 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 && |
| !(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) && |
| (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), |
| GetPropertyFn, 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 { |
| FieldDecl *Field = |
| IMP->getClassInterface()->lookupFieldDeclForIvar(getContext(), Ivar); |
| LValue LV = EmitLValueForIvar(TypeOfSelfObject(), |
| LoadObjCSelf(), Ivar, Field, 0); |
| if (hasAggregateLLVMType(Ivar->getType())) { |
| EmitAggregateCopy(ReturnValue, LV.getAddress(), Ivar->getType()); |
| } |
| else { |
| CodeGenTypes &Types = CGM.getTypes(); |
| RValue RV = EmitLoadOfLValue(LV, Ivar->getType()); |
| RV = RValue::get(Builder.CreateBitCast(RV.getScalarVal(), |
| Types.ConvertType(PD->getType()))); |
| EmitReturnOfRValue(RV, PD->getType()); |
| } |
| } |
| |
| FinishFunction(); |
| } |
| |
| /// 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)"); |
| // FIXME: This is rather murky, we create this here since they will |
| // not have been created by Sema for us. |
| OMD->createImplicitParams(getContext(), IMP->getClassInterface()); |
| 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), |
| SetPropertyFn, Args); |
| } else { |
| SourceLocation Loc = PD->getLocation(); |
| ValueDecl *Self = OMD->getSelfDecl(); |
| ObjCIvarDecl *Ivar = PID->getPropertyIvarDecl(); |
| DeclRefExpr Base(Self, Self->getType(), Loc); |
| ParmVarDecl *ArgDecl = *OMD->param_begin(); |
| DeclRefExpr Arg(ArgDecl, ArgDecl->getType(), Loc); |
| ObjCInterfaceDecl *OI = IMP->getClassInterface(); |
| ObjCIvarRefExpr IvarRef(Ivar, Ivar->getType(), Loc, &Base, |
| true, true); |
| getContext().setFieldDecl(OI, Ivar, &IvarRef); |
| BinaryOperator Assign(&IvarRef, &Arg, BinaryOperator::Assign, |
| Ivar->getType(), Loc); |
| EmitStmt(&Assign); |
| } |
| |
| FinishFunction(); |
| } |
| |
| llvm::Value *CodeGenFunction::LoadObjCSelf() { |
| const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); |
| // See if we need to lazily forward self inside a block literal. |
| BlockForwardSelf(); |
| return Builder.CreateLoad(LocalDeclMap[OMD->getSelfDecl()], "self"); |
| } |
| |
| QualType CodeGenFunction::TypeOfSelfObject() { |
| const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); |
| ImplicitParamDecl *selfDecl = OMD->getSelfDecl(); |
| const PointerType *PTy = |
| cast<PointerType>(getContext().getCanonicalType(selfDecl->getType())); |
| return PTy->getPointeeType(); |
| } |
| |
| RValue CodeGenFunction::EmitObjCSuperPropertyGet(const Expr *Exp, |
| const Selector &S) { |
| llvm::Value *Receiver = LoadObjCSelf(); |
| const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); |
| bool isClassMessage = OMD->isClassMethod(); |
| bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext()); |
| return CGM.getObjCRuntime().GenerateMessageSendSuper(*this, |
| Exp->getType(), |
| S, |
| OMD->getClassInterface(), |
| isCategoryImpl, |
| Receiver, |
| isClassMessage, |
| CallArgList()); |
| |
| } |
| |
| RValue CodeGenFunction::EmitObjCPropertyGet(const Expr *Exp) { |
| // FIXME: Split it into two separate routines. |
| if (const ObjCPropertyRefExpr *E = dyn_cast<ObjCPropertyRefExpr>(Exp)) { |
| Selector S = E->getProperty()->getGetterName(); |
| if (isa<ObjCSuperExpr>(E->getBase())) |
| return EmitObjCSuperPropertyGet(E, S); |
| return CGM.getObjCRuntime(). |
| GenerateMessageSend(*this, Exp->getType(), S, |
| EmitScalarExpr(E->getBase()), |
| false, CallArgList()); |
| } |
| else { |
| const ObjCKVCRefExpr *KE = cast<ObjCKVCRefExpr>(Exp); |
| Selector S = KE->getGetterMethod()->getSelector(); |
| llvm::Value *Receiver; |
| if (KE->getClassProp()) { |
| const ObjCInterfaceDecl *OID = KE->getClassProp(); |
| Receiver = CGM.getObjCRuntime().GetClass(Builder, OID); |
| } |
| else if (isa<ObjCSuperExpr>(KE->getBase())) |
| return EmitObjCSuperPropertyGet(KE, S); |
| else |
| Receiver = EmitScalarExpr(KE->getBase()); |
| return CGM.getObjCRuntime(). |
| GenerateMessageSend(*this, Exp->getType(), S, |
| Receiver, |
| KE->getClassProp() != 0, CallArgList()); |
| } |
| } |
| |
| void CodeGenFunction::EmitObjCSuperPropertySet(const Expr *Exp, |
| const Selector &S, |
| RValue Src) { |
| CallArgList Args; |
| llvm::Value *Receiver = LoadObjCSelf(); |
| const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); |
| bool isClassMessage = OMD->isClassMethod(); |
| bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext()); |
| Args.push_back(std::make_pair(Src, Exp->getType())); |
| CGM.getObjCRuntime().GenerateMessageSendSuper(*this, |
| Exp->getType(), |
| S, |
| OMD->getClassInterface(), |
| isCategoryImpl, |
| Receiver, |
| isClassMessage, |
| Args); |
| return; |
| } |
| |
| void CodeGenFunction::EmitObjCPropertySet(const Expr *Exp, |
| RValue Src) { |
| // FIXME: Split it into two separate routines. |
| if (const ObjCPropertyRefExpr *E = dyn_cast<ObjCPropertyRefExpr>(Exp)) { |
| Selector S = E->getProperty()->getSetterName(); |
| if (isa<ObjCSuperExpr>(E->getBase())) { |
| EmitObjCSuperPropertySet(E, S, Src); |
| return; |
| } |
| CallArgList Args; |
| Args.push_back(std::make_pair(Src, E->getType())); |
| CGM.getObjCRuntime().GenerateMessageSend(*this, getContext().VoidTy, S, |
| EmitScalarExpr(E->getBase()), |
| false, Args); |
| } |
| else if (const ObjCKVCRefExpr *E = dyn_cast<ObjCKVCRefExpr>(Exp)) { |
| Selector S = E->getSetterMethod()->getSelector(); |
| CallArgList Args; |
| llvm::Value *Receiver; |
| if (E->getClassProp()) { |
| const ObjCInterfaceDecl *OID = E->getClassProp(); |
| Receiver = CGM.getObjCRuntime().GetClass(Builder, OID); |
| } |
| else if (isa<ObjCSuperExpr>(E->getBase())) { |
| EmitObjCSuperPropertySet(E, S, Src); |
| return; |
| } |
| else |
| Receiver = EmitScalarExpr(E->getBase()); |
| Args.push_back(std::make_pair(Src, E->getType())); |
| CGM.getObjCRuntime().GenerateMessageSend(*this, getContext().VoidTy, S, |
| Receiver, |
| E->getClassProp() != 0, Args); |
| } |
| else |
| assert (0 && "bad expression node in EmitObjCPropertySet"); |
| } |
| |
| void CodeGenFunction::EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S){ |
| llvm::Constant *EnumerationMutationFn = |
| CGM.getObjCRuntime().EnumerationMutationFunction(); |
| llvm::Value *DeclAddress; |
| QualType ElementTy; |
| |
| if (!EnumerationMutationFn) { |
| CGM.ErrorUnsupported(&S, "Obj-C fast enumeration for this runtime"); |
| return; |
| } |
| |
| if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) { |
| EmitStmt(SD); |
| assert(HaveInsertPoint() && "DeclStmt destroyed insert point!"); |
| const Decl* D = SD->getSingleDecl(); |
| ElementTy = cast<ValueDecl>(D)->getType(); |
| DeclAddress = LocalDeclMap[D]; |
| } else { |
| ElementTy = cast<Expr>(S.getElement())->getType(); |
| DeclAddress = 0; |
| } |
| |
| // Fast enumeration state. |
| QualType StateTy = getContext().getObjCFastEnumerationStateType(); |
| llvm::AllocaInst *StatePtr = CreateTempAlloca(ConvertType(StateTy), |
| "state.ptr"); |
| StatePtr->setAlignment(getContext().getTypeAlign(StateTy) >> 3); |
| EmitMemSetToZero(StatePtr, StateTy); |
| |
| // Number of elements in the items array. |
| static const unsigned NumItems = 16; |
| |
| // Get selector |
| llvm::SmallVector<IdentifierInfo*, 3> II; |
| II.push_back(&CGM.getContext().Idents.get("countByEnumeratingWithState")); |
| II.push_back(&CGM.getContext().Idents.get("objects")); |
| II.push_back(&CGM.getContext().Idents.get("count")); |
| Selector FastEnumSel = CGM.getContext().Selectors.getSelector(II.size(), |
| &II[0]); |
| |
| QualType ItemsTy = |
| getContext().getConstantArrayType(getContext().getObjCIdType(), |
| llvm::APInt(32, NumItems), |
| ArrayType::Normal, 0); |
| llvm::Value *ItemsPtr = CreateTempAlloca(ConvertType(ItemsTy), "items.ptr"); |
| |
| llvm::Value *Collection = EmitScalarExpr(S.getCollection()); |
| |
| CallArgList Args; |
| Args.push_back(std::make_pair(RValue::get(StatePtr), |
| getContext().getPointerType(StateTy))); |
| |
| Args.push_back(std::make_pair(RValue::get(ItemsPtr), |
| getContext().getPointerType(ItemsTy))); |
| |
| 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)); |
| |
| RValue CountRV = |
| CGM.getObjCRuntime().GenerateMessageSend(*this, |
| getContext().UnsignedLongTy, |
| FastEnumSel, |
| Collection, false, Args); |
| |
| llvm::Value *LimitPtr = CreateTempAlloca(UnsignedLongLTy, "limit.ptr"); |
| Builder.CreateStore(CountRV.getScalarVal(), LimitPtr); |
| |
| llvm::BasicBlock *NoElements = createBasicBlock("noelements"); |
| llvm::BasicBlock *SetStartMutations = createBasicBlock("setstartmutations"); |
| |
| llvm::Value *Limit = Builder.CreateLoad(LimitPtr); |
| llvm::Value *Zero = llvm::Constant::getNullValue(UnsignedLongLTy); |
| |
| llvm::Value *IsZero = Builder.CreateICmpEQ(Limit, Zero, "iszero"); |
| Builder.CreateCondBr(IsZero, NoElements, SetStartMutations); |
| |
| EmitBlock(SetStartMutations); |
| |
| llvm::Value *StartMutationsPtr = |
| CreateTempAlloca(UnsignedLongLTy); |
| |
| llvm::Value *StateMutationsPtrPtr = |
| Builder.CreateStructGEP(StatePtr, 2, "mutationsptr.ptr"); |
| llvm::Value *StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, |
| "mutationsptr"); |
| |
| llvm::Value *StateMutations = Builder.CreateLoad(StateMutationsPtr, |
| "mutations"); |
| |
| Builder.CreateStore(StateMutations, StartMutationsPtr); |
| |
| llvm::BasicBlock *LoopStart = createBasicBlock("loopstart"); |
| EmitBlock(LoopStart); |
| |
| llvm::Value *CounterPtr = CreateTempAlloca(UnsignedLongLTy, "counter.ptr"); |
| Builder.CreateStore(Zero, CounterPtr); |
| |
| llvm::BasicBlock *LoopBody = createBasicBlock("loopbody"); |
| EmitBlock(LoopBody); |
| |
| StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, "mutationsptr"); |
| StateMutations = Builder.CreateLoad(StateMutationsPtr, "statemutations"); |
| |
| llvm::Value *StartMutations = Builder.CreateLoad(StartMutationsPtr, |
| "mutations"); |
| llvm::Value *MutationsEqual = Builder.CreateICmpEQ(StateMutations, |
| StartMutations, |
| "tobool"); |
| |
| |
| llvm::BasicBlock *WasMutated = createBasicBlock("wasmutated"); |
| llvm::BasicBlock *WasNotMutated = createBasicBlock("wasnotmutated"); |
| |
| Builder.CreateCondBr(MutationsEqual, WasNotMutated, WasMutated); |
| |
| EmitBlock(WasMutated); |
| 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), |
| EnumerationMutationFn, Args2); |
| |
| EmitBlock(WasNotMutated); |
| |
| llvm::Value *StateItemsPtr = |
| Builder.CreateStructGEP(StatePtr, 1, "stateitems.ptr"); |
| |
| llvm::Value *Counter = Builder.CreateLoad(CounterPtr, "counter"); |
| |
| llvm::Value *EnumStateItems = Builder.CreateLoad(StateItemsPtr, |
| "stateitems"); |
| |
| llvm::Value *CurrentItemPtr = |
| Builder.CreateGEP(EnumStateItems, Counter, "currentitem.ptr"); |
| |
| llvm::Value *CurrentItem = Builder.CreateLoad(CurrentItemPtr, "currentitem"); |
| |
| // Cast the item to the right type. |
| CurrentItem = Builder.CreateBitCast(CurrentItem, |
| ConvertType(ElementTy), "tmp"); |
| |
| if (!DeclAddress) { |
| LValue LV = EmitLValue(cast<Expr>(S.getElement())); |
| |
| // Set the value to null. |
| Builder.CreateStore(CurrentItem, LV.getAddress()); |
| } else |
| Builder.CreateStore(CurrentItem, DeclAddress); |
| |
| // Increment the counter. |
| Counter = Builder.CreateAdd(Counter, |
| llvm::ConstantInt::get(UnsignedLongLTy, 1)); |
| Builder.CreateStore(Counter, CounterPtr); |
| |
| llvm::BasicBlock *LoopEnd = createBasicBlock("loopend"); |
| llvm::BasicBlock *AfterBody = createBasicBlock("afterbody"); |
| |
| BreakContinueStack.push_back(BreakContinue(LoopEnd, AfterBody)); |
| |
| EmitStmt(S.getBody()); |
| |
| BreakContinueStack.pop_back(); |
| |
| EmitBlock(AfterBody); |
| |
| llvm::BasicBlock *FetchMore = createBasicBlock("fetchmore"); |
| |
| Counter = Builder.CreateLoad(CounterPtr); |
| Limit = Builder.CreateLoad(LimitPtr); |
| llvm::Value *IsLess = Builder.CreateICmpULT(Counter, Limit, "isless"); |
| Builder.CreateCondBr(IsLess, LoopBody, FetchMore); |
| |
| // Fetch more elements. |
| EmitBlock(FetchMore); |
| |
| CountRV = |
| CGM.getObjCRuntime().GenerateMessageSend(*this, |
| getContext().UnsignedLongTy, |
| FastEnumSel, |
| Collection, false, Args); |
| Builder.CreateStore(CountRV.getScalarVal(), LimitPtr); |
| Limit = Builder.CreateLoad(LimitPtr); |
| |
| IsZero = Builder.CreateICmpEQ(Limit, Zero, "iszero"); |
| Builder.CreateCondBr(IsZero, NoElements, LoopStart); |
| |
| // No more elements. |
| EmitBlock(NoElements); |
| |
| if (!DeclAddress) { |
| // If the element was not a declaration, set it to be null. |
| |
| LValue LV = EmitLValue(cast<Expr>(S.getElement())); |
| |
| // Set the value to null. |
| Builder.CreateStore(llvm::Constant::getNullValue(ConvertType(ElementTy)), |
| LV.getAddress()); |
| } |
| |
| EmitBlock(LoopEnd); |
| } |
| |
| void CodeGenFunction::EmitObjCAtTryStmt(const ObjCAtTryStmt &S) |
| { |
| CGM.getObjCRuntime().EmitTryOrSynchronizedStmt(*this, S); |
| } |
| |
| void CodeGenFunction::EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S) |
| { |
| CGM.getObjCRuntime().EmitThrowStmt(*this, S); |
| } |
| |
| void CodeGenFunction::EmitObjCAtSynchronizedStmt( |
| const ObjCAtSynchronizedStmt &S) |
| { |
| CGM.getObjCRuntime().EmitTryOrSynchronizedStmt(*this, S); |
| } |
| |
| CGObjCRuntime::~CGObjCRuntime() {} |