C++ CodeGenFunction类代码示例

/// \brief Emits code for OpenMP 'if' clause using specified \a CodeGen
/// function. Here is the logic:
/// if (Cond) {
///   CodeGen(true);
/// } else {
///   CodeGen(false);
/// }
static void EmitOMPIfClause(CodeGenFunction &CGF, const Expr *Cond,
                            const std::function<void(bool)> &CodeGen) {
  CodeGenFunction::LexicalScope ConditionScope(CGF, Cond->getSourceRange());

  // If the condition constant folds and can be elided, try to avoid emitting
  // the condition and the dead arm of the if/else.
  bool CondConstant;
  if (CGF.ConstantFoldsToSimpleInteger(Cond, CondConstant)) {
    CodeGen(CondConstant);
    return;
  }

  // Otherwise, the condition did not fold, or we couldn't elide it.  Just
  // emit the conditional branch.
  auto ThenBlock = CGF.createBasicBlock(/*name*/ "omp_if.then");
  auto ElseBlock = CGF.createBasicBlock(/*name*/ "omp_if.else");
  auto ContBlock = CGF.createBasicBlock(/*name*/ "omp_if.end");
  CGF.EmitBranchOnBoolExpr(Cond, ThenBlock, ElseBlock, /*TrueCount*/ 0);

  // Emit the 'then' code.
  CGF.EmitBlock(ThenBlock);
  CodeGen(/*ThenBlock*/ true);
  CGF.EmitBranch(ContBlock);
  // Emit the 'else' code if present.
  {
    // There is no need to emit line number for unconditional branch.
    ApplyDebugLocation DL(CGF);
    CGF.EmitBlock(ElseBlock);
  }
  CodeGen(/*ThenBlock*/ false);
  {
    // There is no need to emit line number for unconditional branch.
    ApplyDebugLocation DL(CGF);
    CGF.EmitBranch(ContBlock);
  }
  // Emit the continuation block for code after the if.
  CGF.EmitBlock(ContBlock, /*IsFinished*/ true);
}

// CopyObject - Utility to copy an object.  Calls copy constructor as necessary.
// N is casted to the right type.
static void CopyObject(CodeGenFunction &CGF, QualType ObjectType,
                       bool WasPointer, bool WasPointerReference,
                       llvm::Value *E, llvm::Value *N) {
  // Store the throw exception in the exception object.
  if (WasPointer || !CGF.hasAggregateLLVMType(ObjectType)) {
    llvm::Value *Value = E;
    if (!WasPointer)
      Value = CGF.Builder.CreateLoad(Value);
    const llvm::Type *ValuePtrTy = Value->getType()->getPointerTo(0);
    if (WasPointerReference) {
      llvm::Value *Tmp = CGF.CreateTempAlloca(Value->getType(), "catch.param");
      CGF.Builder.CreateStore(Value, Tmp);
      Value = Tmp;
      ValuePtrTy = Value->getType()->getPointerTo(0);
    }
    N = CGF.Builder.CreateBitCast(N, ValuePtrTy);
    CGF.Builder.CreateStore(Value, N);
  } else {
    const llvm::Type *Ty = CGF.ConvertType(ObjectType)->getPointerTo(0);
    const CXXRecordDecl *RD;
    RD = cast<CXXRecordDecl>(ObjectType->getAs<RecordType>()->getDecl());
    llvm::Value *This = CGF.Builder.CreateBitCast(N, Ty);
    if (RD->hasTrivialCopyConstructor()) {
      CGF.EmitAggregateCopy(This, E, ObjectType);
    } else if (CXXConstructorDecl *CopyCtor
               = RD->getCopyConstructor(CGF.getContext(), 0)) {
      llvm::Value *Src = E;

      // Stolen from EmitClassAggrMemberwiseCopy
      llvm::Value *Callee = CGF.CGM.GetAddrOfCXXConstructor(CopyCtor,
                                                            Ctor_Complete);
      CallArgList CallArgs;
      CallArgs.push_back(std::make_pair(RValue::get(This),
                                      CopyCtor->getThisType(CGF.getContext())));

      // Push the Src ptr.
      CallArgs.push_back(std::make_pair(RValue::get(Src),
                                        CopyCtor->getParamDecl(0)->getType()));

      const FunctionProtoType *FPT
        = CopyCtor->getType()->getAs<FunctionProtoType>();
      CGF.EmitCall(CGF.CGM.getTypes().getFunctionInfo(CallArgs, FPT),
                   Callee, ReturnValueSlot(), CallArgs, CopyCtor);
    } else
      llvm_unreachable("uncopyable object");
  }
}

/// Emit code to cause the variable at the given address to be considered as
/// constant from this point onwards.
static void EmitDeclInvariant(CodeGenFunction &CGF, const VarDecl &D,
                              llvm::Constant *Addr) {
  // Do not emit the intrinsic if we're not optimizing.
  if (!CGF.CGM.getCodeGenOpts().OptimizationLevel)
    return;

  // Grab the llvm.invariant.start intrinsic.
  llvm::Intrinsic::ID InvStartID = llvm::Intrinsic::invariant_start;
  // Overloaded address space type.
  llvm::Type *ObjectPtr[1] = {CGF.Int8PtrTy};
  llvm::Constant *InvariantStart = CGF.CGM.getIntrinsic(InvStartID, ObjectPtr);

  // Emit a call with the size in bytes of the object.
  CharUnits WidthChars = CGF.getContext().getTypeSizeInChars(D.getType());
  uint64_t Width = WidthChars.getQuantity();
  llvm::Value *Args[2] = { llvm::ConstantInt::getSigned(CGF.Int64Ty, Width),
                           llvm::ConstantExpr::getBitCast(Addr, CGF.Int8PtrTy)};
  CGF.Builder.CreateCall(InvariantStart, Args);
}

void ItaniumCXXABI::ReadArrayCookie(CodeGenFunction &CGF,
                                    llvm::Value *Ptr,
                                    const CXXDeleteExpr *expr,
                                    QualType ElementType,
                                    llvm::Value *&NumElements,
                                    llvm::Value *&AllocPtr,
                                    CharUnits &CookieSize) {
  // Derive a char* in the same address space as the pointer.
  unsigned AS = cast<llvm::PointerType>(Ptr->getType())->getAddressSpace();
  llvm::Type *CharPtrTy = CGF.Builder.getInt8Ty()->getPointerTo(AS);

  // If we don't need an array cookie, bail out early.
  if (!NeedsArrayCookie(expr, ElementType)) {
    AllocPtr = CGF.Builder.CreateBitCast(Ptr, CharPtrTy);
    NumElements = 0;
    CookieSize = CharUnits::Zero();
    return;
  }

  QualType SizeTy = getContext().getSizeType();
  CharUnits SizeSize = getContext().getTypeSizeInChars(SizeTy);
  llvm::Type *SizeLTy = CGF.ConvertType(SizeTy);
  
  CookieSize
    = std::max(SizeSize, getContext().getTypeAlignInChars(ElementType));

  CharUnits NumElementsOffset = CookieSize - SizeSize;

  // Compute the allocated pointer.
  AllocPtr = CGF.Builder.CreateBitCast(Ptr, CharPtrTy);
  AllocPtr = CGF.Builder.CreateConstInBoundsGEP1_64(AllocPtr,
                                                    -CookieSize.getQuantity());

  llvm::Value *NumElementsPtr = AllocPtr;
  if (!NumElementsOffset.isZero())
    NumElementsPtr =
      CGF.Builder.CreateConstInBoundsGEP1_64(NumElementsPtr,
                                             NumElementsOffset.getQuantity());
  NumElementsPtr = 
    CGF.Builder.CreateBitCast(NumElementsPtr, SizeLTy->getPointerTo(AS));
  NumElements = CGF.Builder.CreateLoad(NumElementsPtr);
}

static void EmitDeclInit(CodeGenFunction &CGF, const VarDecl &D,
                         ConstantAddress DeclPtr) {
  assert(
      (D.hasGlobalStorage() ||
       (D.hasLocalStorage() && CGF.getContext().getLangOpts().OpenCLCPlusPlus)) &&
      "VarDecl must have global or local (in the case of OpenCL) storage!");
  assert(!D.getType()->isReferenceType() &&
         "Should not call EmitDeclInit on a reference!");

  QualType type = D.getType();
  LValue lv = CGF.MakeAddrLValue(DeclPtr, type);

  const Expr *Init = D.getInit();
  switch (CGF.getEvaluationKind(type)) {
  case TEK_Scalar: {
    CodeGenModule &CGM = CGF.CGM;
    if (lv.isObjCStrong())
      CGM.getObjCRuntime().EmitObjCGlobalAssign(CGF, CGF.EmitScalarExpr(Init),
                                                DeclPtr, D.getTLSKind());
    else if (lv.isObjCWeak())
      CGM.getObjCRuntime().EmitObjCWeakAssign(CGF, CGF.EmitScalarExpr(Init),
                                              DeclPtr);
    else
      CGF.EmitScalarInit(Init, &D, lv, false);
    return;
  }
  case TEK_Complex:
    CGF.EmitComplexExprIntoLValue(Init, lv, /*isInit*/ true);
    return;
  case TEK_Aggregate:
    CGF.EmitAggExpr(Init, AggValueSlot::forLValue(lv,AggValueSlot::IsDestructed,
                                          AggValueSlot::DoesNotNeedGCBarriers,
                                                  AggValueSlot::IsNotAliased,
                                                  AggValueSlot::DoesNotOverlap));
    return;
  }
  llvm_unreachable("bad evaluation kind");
}

static void
AddDirectArgument(CodeGenFunction &CGF, CallArgList &Args,
                  bool UseOptimizedLibcall, llvm::Value *Val, QualType ValTy,
                  SourceLocation Loc, CharUnits SizeInChars) {
  if (UseOptimizedLibcall) {
    // Load value and pass it to the function directly.
    unsigned Align = CGF.getContext().getTypeAlignInChars(ValTy).getQuantity();
    int64_t SizeInBits = CGF.getContext().toBits(SizeInChars);
    ValTy =
        CGF.getContext().getIntTypeForBitwidth(SizeInBits, /*Signed=*/false);
    llvm::Type *IPtrTy = llvm::IntegerType::get(CGF.getLLVMContext(),
                                                SizeInBits)->getPointerTo();
    Val = CGF.EmitLoadOfScalar(CGF.Builder.CreateBitCast(Val, IPtrTy), false,
                               Align, CGF.getContext().getPointerType(ValTy),
                               Loc);
    // Coerce the value into an appropriately sized integer type.
    Args.add(RValue::get(Val), ValTy);
  } else {
    // Non-optimized functions always take a reference.
    Args.add(RValue::get(CGF.EmitCastToVoidPtr(Val)),
                         CGF.getContext().VoidPtrTy);
  }
}

static void EmitDeclInit(CodeGenFunction &CGF, const VarDecl &D,
                         llvm::Constant *DeclPtr) {
  assert(D.hasGlobalStorage() && "VarDecl must have global storage!");
  assert(!D.getType()->isReferenceType() && 
         "Should not call EmitDeclInit on a reference!");
  
  ASTContext &Context = CGF.getContext();

  CharUnits alignment = Context.getDeclAlign(&D);
  QualType type = D.getType();
  LValue lv = CGF.MakeAddrLValue(DeclPtr, type, alignment);

  const Expr *Init = D.getInit();
  switch (CGF.getEvaluationKind(type)) {
  case TEK_Scalar: {
    CodeGenModule &CGM = CGF.CGM;
    if (lv.isObjCStrong())
      CGM.getObjCRuntime().EmitObjCGlobalAssign(CGF, CGF.EmitScalarExpr(Init),
                                                DeclPtr, D.isThreadSpecified());
    else if (lv.isObjCWeak())
      CGM.getObjCRuntime().EmitObjCWeakAssign(CGF, CGF.EmitScalarExpr(Init),
                                              DeclPtr);
    else
      CGF.EmitScalarInit(Init, &D, lv, false);
    return;
  }
  case TEK_Complex:
    CGF.EmitComplexExprIntoLValue(Init, lv, /*isInit*/ true);
    return;
  case TEK_Aggregate:
    CGF.EmitAggExpr(Init, AggValueSlot::forLValue(lv,AggValueSlot::IsDestructed,
                                          AggValueSlot::DoesNotNeedGCBarriers,
                                                  AggValueSlot::IsNotAliased));
    return;
  }
  llvm_unreachable("bad evaluation kind");
}

void CGOpenMPRuntime::EmitOMPForInit(CodeGenFunction &CGF, SourceLocation Loc,
                                     OpenMPScheduleClauseKind ScheduleKind,
                                     unsigned IVSize, bool IVSigned,
                                     llvm::Value *IL, llvm::Value *LB,
                                     llvm::Value *UB, llvm::Value *ST,
                                     llvm::Value *Chunk) {
  OpenMPSchedType Schedule = getRuntimeSchedule(ScheduleKind, Chunk != nullptr);
  // Call __kmpc_for_static_init(
  //          ident_t *loc, kmp_int32 tid, kmp_int32 schedtype,
  //          kmp_int32 *p_lastiter, kmp_int[32|64] *p_lower,
  //          kmp_int[32|64] *p_upper, kmp_int[32|64] *p_stride,
  //          kmp_int[32|64] incr, kmp_int[32|64] chunk);
  // TODO: Implement dynamic schedule.

  // If the Chunk was not specified in the clause - use default value 1.
  if (Chunk == nullptr)
    Chunk = CGF.Builder.getIntN(IVSize, /*C*/ 1);

  llvm::Value *Args[] = {
      EmitOpenMPUpdateLocation(CGF, Loc, OMP_IDENT_KMPC),
      GetOpenMPThreadID(CGF, Loc),
      CGF.Builder.getInt32(Schedule), // Schedule type
      IL,                             // &isLastIter
      LB,                             // &LB
      UB,                             // &UB
      ST,                             // &Stride
      CGF.Builder.getIntN(IVSize, 1), // Incr
      Chunk                           // Chunk
  };
  assert((IVSize == 32 || IVSize == 64) &&
         "Index size is not compatible with the omp runtime");
  auto F = IVSize == 32 ? (IVSigned ? OMPRTL__kmpc_for_static_init_4
                                    : OMPRTL__kmpc_for_static_init_4u)
                        : (IVSigned ? OMPRTL__kmpc_for_static_init_8
                                    : OMPRTL__kmpc_for_static_init_8u);
  auto RTLFn = CreateRuntimeFunction(F);
  CGF.EmitRuntimeCall(RTLFn, Args);
}

void CGCXXABI::buildThisParam(CodeGenFunction &CGF, FunctionArgList &params) {
  const CXXMethodDecl *MD = cast<CXXMethodDecl>(CGF.CurGD.getDecl());

  // FIXME: I'm not entirely sure I like using a fake decl just for code
  // generation. Maybe we can come up with a better way?
  ImplicitParamDecl *ThisDecl
    = ImplicitParamDecl::Create(CGM.getContext(), nullptr, MD->getLocation(),
                                &CGM.getContext().Idents.get("this"),
                                MD->getThisType(CGM.getContext()));
  params.push_back(ThisDecl);
  CGF.CXXABIThisDecl = ThisDecl;

  // Compute the presumed alignment of 'this', which basically comes
  // down to whether we know it's a complete object or not.
  auto &Layout = CGF.getContext().getASTRecordLayout(MD->getParent());
  if (MD->getParent()->getNumVBases() == 0 || // avoid vcall in common case
      MD->getParent()->hasAttr<FinalAttr>() ||
      !isThisCompleteObject(CGF.CurGD)) {
    CGF.CXXABIThisAlignment = Layout.getAlignment();
  } else {
    CGF.CXXABIThisAlignment = Layout.getNonVirtualAlignment();
  }
}

/// isSimpleZero - If emitting this value will obviously just cause a store of
/// zero to memory, return true.  This can return false if uncertain, so it just
/// handles simple cases.
static bool isSimpleZero(const Expr *E, CodeGenFunction &CGF) {
  E = E->IgnoreParens();

  // 0
  if (const IntegerLiteral *IL = dyn_cast<IntegerLiteral>(E))
    return IL->getValue() == 0;
  // +0.0
  if (const FloatingLiteral *FL = dyn_cast<FloatingLiteral>(E))
    return FL->getValue().isPosZero();
  // int()
  if ((isa<ImplicitValueInitExpr>(E) || isa<CXXScalarValueInitExpr>(E)) &&
      CGF.getTypes().isZeroInitializable(E->getType()))
    return true;
  // (int*)0 - Null pointer expressions.
  if (const CastExpr *ICE = dyn_cast<CastExpr>(E))
    return ICE->getCastKind() == CK_NullToPointer;
  // '\0'
  if (const CharacterLiteral *CL = dyn_cast<CharacterLiteral>(E))
    return CL->getValue() == 0;
  
  // Otherwise, hard case: conservatively return false.
  return false;
}

/// CreateCoercedStore - Create a store to \arg DstPtr from \arg Src,
/// where the source and destination may have different types.
///
/// This safely handles the case when the src type is larger than the
/// destination type; the upper bits of the src will be lost.
static void CreateCoercedStore(llvm::Value *Src,
                               llvm::Value *DstPtr,
                               bool DstIsVolatile,
                               CodeGenFunction &CGF) {
  const llvm::Type *SrcTy = Src->getType();
  const llvm::Type *DstTy =
    cast<llvm::PointerType>(DstPtr->getType())->getElementType();

  uint64_t SrcSize = CGF.CGM.getTargetData().getTypeAllocSize(SrcTy);
  uint64_t DstSize = CGF.CGM.getTargetData().getTypeAllocSize(DstTy);

  // If store is legal, just bitcast the src pointer.
  if (SrcSize <= DstSize) {
    llvm::Value *Casted =
      CGF.Builder.CreateBitCast(DstPtr, llvm::PointerType::getUnqual(SrcTy));
    // FIXME: Use better alignment / avoid requiring aligned store.
    CGF.Builder.CreateStore(Src, Casted, DstIsVolatile)->setAlignment(1);
  } else {
    // Otherwise do coercion through memory. This is stupid, but
    // simple.

    // Generally SrcSize is never greater than DstSize, since this means we are
    // losing bits. However, this can happen in cases where the structure has
    // additional padding, for example due to a user specified alignment.
    //
    // FIXME: Assert that we aren't truncating non-padding bits when have access
    // to that information.
    llvm::Value *Tmp = CGF.CreateTempAlloca(SrcTy);
    CGF.Builder.CreateStore(Src, Tmp);
    llvm::Value *Casted =
      CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(DstTy));
    llvm::LoadInst *Load = CGF.Builder.CreateLoad(Casted);
    // FIXME: Use better alignment / avoid requiring aligned load.
    Load->setAlignment(1);
    CGF.Builder.CreateStore(Load, DstPtr, DstIsVolatile);
  }
}

/// We don't need a normal entry block for the given cleanup.
/// Optimistic fixup branches can cause these blocks to come into
/// existence anyway;  if so, destroy it.
///
/// The validity of this transformation is very much specific to the
/// exact ways in which we form branches to cleanup entries.
static void destroyOptimisticNormalEntry(CodeGenFunction &CGF,
                                         EHCleanupScope &scope) {
  llvm::BasicBlock *entry = scope.getNormalBlock();
  if (!entry) return;

  // Replace all the uses with unreachable.
  llvm::BasicBlock *unreachableBB = CGF.getUnreachableBlock();
  for (llvm::BasicBlock::use_iterator
         i = entry->use_begin(), e = entry->use_end(); i != e; ) {
    llvm::Use &use = *i;
    ++i;

    use.set(unreachableBB);
    
    // The only uses should be fixup switches.
    llvm::SwitchInst *si = cast<llvm::SwitchInst>(use.getUser());
    if (si->getNumCases() == 1 && si->getDefaultDest() == unreachableBB) {
      // Replace the switch with a branch.
      llvm::BranchInst::Create(si->case_begin().getCaseSuccessor(), si);

      // The switch operand is a load from the cleanup-dest alloca.
      llvm::LoadInst *condition = cast<llvm::LoadInst>(si->getCondition());

      // Destroy the switch.
      si->eraseFromParent();

      // Destroy the load.
      assert(condition->getOperand(0) == CGF.NormalCleanupDest);
      assert(condition->use_empty());
      condition->eraseFromParent();
    }
  }
  
  assert(entry->use_empty());
  delete entry;
}

static RValue PerformReturnAdjustment(CodeGenFunction &CGF,
                                      QualType ResultType, RValue RV,
                                      const ThunkInfo &Thunk) {
  // Emit the return adjustment.
  bool NullCheckValue = !ResultType->isReferenceType();

  llvm::BasicBlock *AdjustNull = nullptr;
  llvm::BasicBlock *AdjustNotNull = nullptr;
  llvm::BasicBlock *AdjustEnd = nullptr;

  llvm::Value *ReturnValue = RV.getScalarVal();

  if (NullCheckValue) {
    AdjustNull = CGF.createBasicBlock("adjust.null");
    AdjustNotNull = CGF.createBasicBlock("adjust.notnull");
    AdjustEnd = CGF.createBasicBlock("adjust.end");

    llvm::Value *IsNull = CGF.Builder.CreateIsNull(ReturnValue);
    CGF.Builder.CreateCondBr(IsNull, AdjustNull, AdjustNotNull);
    CGF.EmitBlock(AdjustNotNull);
  }

  auto ClassDecl = ResultType->getPointeeType()->getAsCXXRecordDecl();
  auto ClassAlign = CGF.CGM.getClassPointerAlignment(ClassDecl);
  ReturnValue = CGF.CGM.getCXXABI().performReturnAdjustment(CGF,
                                            Address(ReturnValue, ClassAlign),
                                            Thunk.Return);

  if (NullCheckValue) {
    CGF.Builder.CreateBr(AdjustEnd);
    CGF.EmitBlock(AdjustNull);
    CGF.Builder.CreateBr(AdjustEnd);
    CGF.EmitBlock(AdjustEnd);

    llvm::PHINode *PHI = CGF.Builder.CreatePHI(ReturnValue->getType(), 2);
    PHI->addIncoming(ReturnValue, AdjustNotNull);
    PHI->addIncoming(llvm::Constant::getNullValue(ReturnValue->getType()),
                     AdjustNull);
    ReturnValue = PHI;
  }

  return RValue::get(ReturnValue);
}

static RValue PerformReturnAdjustment(CodeGenFunction &CGF,
                                      QualType ResultType, RValue RV,
                                      const ThunkInfo &Thunk) {
  // Emit the return adjustment.
  bool NullCheckValue = !ResultType->isReferenceType();
  
  llvm::BasicBlock *AdjustNull = 0;
  llvm::BasicBlock *AdjustNotNull = 0;
  llvm::BasicBlock *AdjustEnd = 0;
  
  llvm::Value *ReturnValue = RV.getScalarVal();

  if (NullCheckValue) {
    AdjustNull = CGF.createBasicBlock("adjust.null");
    AdjustNotNull = CGF.createBasicBlock("adjust.notnull");
    AdjustEnd = CGF.createBasicBlock("adjust.end");
  
    llvm::Value *IsNull = CGF.Builder.CreateIsNull(ReturnValue);
    CGF.Builder.CreateCondBr(IsNull, AdjustNull, AdjustNotNull);
    CGF.EmitBlock(AdjustNotNull);
  }
  
  ReturnValue = PerformTypeAdjustment(CGF, ReturnValue, 
                                      Thunk.Return.NonVirtual, 
                                      Thunk.Return.VBaseOffsetOffset,
                                      /*IsReturnAdjustment*/true);
  
  if (NullCheckValue) {
    CGF.Builder.CreateBr(AdjustEnd);
    CGF.EmitBlock(AdjustNull);
    CGF.Builder.CreateBr(AdjustEnd);
    CGF.EmitBlock(AdjustEnd);
  
    llvm::PHINode *PHI = CGF.Builder.CreatePHI(ReturnValue->getType(), 2);
    PHI->addIncoming(ReturnValue, AdjustNotNull);
    PHI->addIncoming(llvm::Constant::getNullValue(ReturnValue->getType()), 
                     AdjustNull);
    ReturnValue = PHI;
  }
  
  return RValue::get(ReturnValue);
}

static void EmitDeclInit(CodeGenFunction &CGF, const VarDecl &D,
                         llvm::Constant *DeclPtr) {
  assert(D.hasGlobalStorage() && "VarDecl must have global storage!");
  assert(!D.getType()->isReferenceType() && 
         "Should not call EmitDeclInit on a reference!");
  
  ASTContext &Context = CGF.getContext();
    
  const Expr *Init = D.getInit();
  QualType T = D.getType();
  bool isVolatile = Context.getCanonicalType(T).isVolatileQualified();

  if (!CGF.hasAggregateLLVMType(T)) {
    llvm::Value *V = CGF.EmitScalarExpr(Init);
    CGF.EmitStoreOfScalar(V, DeclPtr, isVolatile, T);
  } else if (T->isAnyComplexType()) {
    CGF.EmitComplexExprIntoAddr(Init, DeclPtr, isVolatile);
  } else {
    CGF.EmitAggExpr(Init, DeclPtr, isVolatile);
  }
}