land David Blaikie's patch to de-constify Type, with a few tweaks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135375 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 65 insertions, 65 deletions

diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp
index 323e2a2809..85badc8b29 100644
--- a/lib/VMCore/ConstantFold.cpp
+++ b/lib/VMCore/ConstantFold.cpp
@@ -42,7 +42,7 @@ using namespace llvm;
 /// specified vector type.  At this point, we know that the elements of the
 /// input vector constant are all simple integer or FP values.
 static Constant *BitCastConstantVector(ConstantVector *CV,
-                                       const VectorType *DstTy) {
+                                       VectorType *DstTy) {
 
   if (CV->isAllOnesValue()) return Constant::getAllOnesValue(DstTy);
   if (CV->isNullValue()) return Constant::getNullValue(DstTy);
@@ -63,7 +63,7 @@ static Constant *BitCastConstantVector(ConstantVector *CV,
 
   // Bitcast each element now.
   std::vector<Constant*> Result;
-  const Type *DstEltTy = DstTy->getElementType();
+  Type *DstEltTy = DstTy->getElementType();
   for (unsigned i = 0; i != NumElts; ++i)
     Result.push_back(ConstantExpr::getBitCast(CV->getOperand(i),
                                                     DstEltTy));
@@ -78,15 +78,15 @@ static unsigned
 foldConstantCastPair(
   unsigned opc,          ///< opcode of the second cast constant expression
   ConstantExpr *Op,      ///< the first cast constant expression
-  const Type *DstTy      ///< desintation type of the first cast
+  Type *DstTy      ///< desintation type of the first cast
 ) {
   assert(Op && Op->isCast() && "Can't fold cast of cast without a cast!");
   assert(DstTy && DstTy->isFirstClassType() && "Invalid cast destination type");
   assert(CastInst::isCast(opc) && "Invalid cast opcode");
 
   // The the types and opcodes for the two Cast constant expressions
-  const Type *SrcTy = Op->getOperand(0)->getType();
-  const Type *MidTy = Op->getType();
+  Type *SrcTy = Op->getOperand(0)->getType();
+  Type *MidTy = Op->getType();
   Instruction::CastOps firstOp = Instruction::CastOps(Op->getOpcode());
   Instruction::CastOps secondOp = Instruction::CastOps(opc);
 
@@ -95,27 +95,27 @@ foldConstantCastPair(
                                         Type::getInt64Ty(DstTy->getContext()));
 }
 
-static Constant *FoldBitCast(Constant *V, const Type *DestTy) {
-  const Type *SrcTy = V->getType();
+static Constant *FoldBitCast(Constant *V, Type *DestTy) {
+  Type *SrcTy = V->getType();
   if (SrcTy == DestTy)
     return V; // no-op cast
 
   // Check to see if we are casting a pointer to an aggregate to a pointer to
   // the first element.  If so, return the appropriate GEP instruction.
-  if (const PointerType *PTy = dyn_cast<PointerType>(V->getType()))
-    if (const PointerType *DPTy = dyn_cast<PointerType>(DestTy))
+  if (PointerType *PTy = dyn_cast<PointerType>(V->getType()))
+    if (PointerType *DPTy = dyn_cast<PointerType>(DestTy))
       if (PTy->getAddressSpace() == DPTy->getAddressSpace()) {
         SmallVector<Value*, 8> IdxList;
         Value *Zero =
           Constant::getNullValue(Type::getInt32Ty(DPTy->getContext()));
         IdxList.push_back(Zero);
-        const Type *ElTy = PTy->getElementType();
+        Type *ElTy = PTy->getElementType();
         while (ElTy != DPTy->getElementType()) {
-          if (const StructType *STy = dyn_cast<StructType>(ElTy)) {
+          if (StructType *STy = dyn_cast<StructType>(ElTy)) {
             if (STy->getNumElements() == 0) break;
             ElTy = STy->getElementType(0);
             IdxList.push_back(Zero);
-          } else if (const SequentialType *STy = 
+          } else if (SequentialType *STy = 
                      dyn_cast<SequentialType>(ElTy)) {
             if (ElTy->isPointerTy()) break;  // Can't index into pointers!
             ElTy = STy->getElementType();
@@ -133,8 +133,8 @@ static Constant *FoldBitCast(Constant *V, const Type *DestTy) {
 
   // Handle casts from one vector constant to another.  We know that the src 
   // and dest type have the same size (otherwise its an illegal cast).
-  if (const VectorType *DestPTy = dyn_cast<VectorType>(DestTy)) {
-    if (const VectorType *SrcTy = dyn_cast<VectorType>(V->getType())) {
+  if (VectorType *DestPTy = dyn_cast<VectorType>(DestTy)) {
+    if (VectorType *SrcTy = dyn_cast<VectorType>(V->getType())) {
       assert(DestPTy->getBitWidth() == SrcTy->getBitWidth() &&
              "Not cast between same sized vectors!");
       SrcTy = NULL;
@@ -332,15 +332,15 @@ static Constant *ExtractConstantBytes(Constant *C, unsigned ByteStart,
 /// return null if no factoring was possible, to avoid endlessly
 /// bouncing an unfoldable expression back into the top-level folder.
 ///
-static Constant *getFoldedSizeOf(const Type *Ty, const Type *DestTy,
+static Constant *getFoldedSizeOf(Type *Ty, Type *DestTy,
                                  bool Folded) {
-  if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
+  if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
     Constant *N = ConstantInt::get(DestTy, ATy->getNumElements());
     Constant *E = getFoldedSizeOf(ATy->getElementType(), DestTy, true);
     return ConstantExpr::getNUWMul(E, N);
   }
 
-  if (const StructType *STy = dyn_cast<StructType>(Ty))
+  if (StructType *STy = dyn_cast<StructType>(Ty))
     if (!STy->isPacked()) {
       unsigned NumElems = STy->getNumElements();
       // An empty struct has size zero.
@@ -364,7 +364,7 @@ static Constant *getFoldedSizeOf(const Type *Ty, const Type *DestTy,
 
   // Pointer size doesn't depend on the pointee type, so canonicalize them
   // to an arbitrary pointee.
-  if (const PointerType *PTy = dyn_cast<PointerType>(Ty))
+  if (PointerType *PTy = dyn_cast<PointerType>(Ty))
     if (!PTy->getElementType()->isIntegerTy(1))
       return
         getFoldedSizeOf(PointerType::get(IntegerType::get(PTy->getContext(), 1),
@@ -389,11 +389,11 @@ static Constant *getFoldedSizeOf(const Type *Ty, const Type *DestTy,
 /// return null if no factoring was possible, to avoid endlessly
 /// bouncing an unfoldable expression back into the top-level folder.
 ///
-static Constant *getFoldedAlignOf(const Type *Ty, const Type *DestTy,
+static Constant *getFoldedAlignOf(Type *Ty, Type *DestTy,
                                   bool Folded) {
   // The alignment of an array is equal to the alignment of the
   // array element. Note that this is not always true for vectors.
-  if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
+  if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
     Constant *C = ConstantExpr::getAlignOf(ATy->getElementType());
     C = ConstantExpr::getCast(CastInst::getCastOpcode(C, false,
                                                       DestTy,
@@ -402,7 +402,7 @@ static Constant *getFoldedAlignOf(const Type *Ty, const Type *DestTy,
     return C;
   }
 
-  if (const StructType *STy = dyn_cast<StructType>(Ty)) {
+  if (StructType *STy = dyn_cast<StructType>(Ty)) {
     // Packed structs always have an alignment of 1.
     if (STy->isPacked())
       return ConstantInt::get(DestTy, 1);
@@ -429,7 +429,7 @@ static Constant *getFoldedAlignOf(const Type *Ty, const Type *DestTy,
 
   // Pointer alignment doesn't depend on the pointee type, so canonicalize them
   // to an arbitrary pointee.
-  if (const PointerType *PTy = dyn_cast<PointerType>(Ty))
+  if (PointerType *PTy = dyn_cast<PointerType>(Ty))
     if (!PTy->getElementType()->isIntegerTy(1))
       return
         getFoldedAlignOf(PointerType::get(IntegerType::get(PTy->getContext(),
@@ -455,10 +455,10 @@ static Constant *getFoldedAlignOf(const Type *Ty, const Type *DestTy,
 /// return null if no factoring was possible, to avoid endlessly
 /// bouncing an unfoldable expression back into the top-level folder.
 ///
-static Constant *getFoldedOffsetOf(const Type *Ty, Constant *FieldNo,
-                                   const Type *DestTy,
+static Constant *getFoldedOffsetOf(Type *Ty, Constant *FieldNo,
+                                   Type *DestTy,
                                    bool Folded) {
-  if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
+  if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
     Constant *N = ConstantExpr::getCast(CastInst::getCastOpcode(FieldNo, false,
                                                                 DestTy, false),
                                         FieldNo, DestTy);
@@ -466,7 +466,7 @@ static Constant *getFoldedOffsetOf(const Type *Ty, Constant *FieldNo,
     return ConstantExpr::getNUWMul(E, N);
   }
 
-  if (const StructType *STy = dyn_cast<StructType>(Ty))
+  if (StructType *STy = dyn_cast<StructType>(Ty))
     if (!STy->isPacked()) {
       unsigned NumElems = STy->getNumElements();
       // An empty struct has no members.
@@ -506,7 +506,7 @@ static Constant *getFoldedOffsetOf(const Type *Ty, Constant *FieldNo,
 }
 
 Constant *llvm::ConstantFoldCastInstruction(unsigned opc, Constant *V,
-                                            const Type *DestTy) {
+                                            Type *DestTy) {
   if (isa<UndefValue>(V)) {
     // zext(undef) = 0, because the top bits will be zero.
     // sext(undef) = 0, because the top bits will all be the same.
@@ -554,8 +554,8 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, Constant *V,
         cast<VectorType>(DestTy)->getNumElements() ==
         CV->getType()->getNumElements()) {
       std::vector<Constant*> res;
-      const VectorType *DestVecTy = cast<VectorType>(DestTy);
-      const Type *DstEltTy = DestVecTy->getElementType();
+      VectorType *DestVecTy = cast<VectorType>(DestTy);
+      Type *DstEltTy = DestVecTy->getElementType();
       for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
         res.push_back(ConstantExpr::getCast(opc,
                                             CV->getOperand(i), DstEltTy));
@@ -608,7 +608,7 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, Constant *V,
     if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
       if (CE->getOpcode() == Instruction::GetElementPtr &&
           CE->getOperand(0)->isNullValue()) {
-        const Type *Ty =
+        Type *Ty =
           cast<PointerType>(CE->getOperand(0)->getType())->getElementType();
         if (CE->getNumOperands() == 2) {
           // Handle a sizeof-like expression.
@@ -623,7 +623,7 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, Constant *V,
         } else if (CE->getNumOperands() == 3 &&
                    CE->getOperand(1)->isNullValue()) {
           // Handle an alignof-like expression.
-          if (const StructType *STy = dyn_cast<StructType>(Ty))
+          if (StructType *STy = dyn_cast<StructType>(Ty))
             if (!STy->isPacked()) {
               ConstantInt *CI = cast<ConstantInt>(CE->getOperand(2));
               if (CI->isOne() &&
@@ -701,7 +701,7 @@ Constant *llvm::ConstantFoldSelectInstruction(Constant *Cond,
 
     if (CondV->isAllOnesValue()) return V1;
 
-    const VectorType *VTy = cast<VectorType>(V1->getType());
+    VectorType *VTy = cast<VectorType>(V1->getType());
     ConstantVector *CP1 = dyn_cast<ConstantVector>(V1);
     ConstantVector *CP2 = dyn_cast<ConstantVector>(V2);
 
@@ -709,7 +709,7 @@ Constant *llvm::ConstantFoldSelectInstruction(Constant *Cond,
         (CP2 || isa<ConstantAggregateZero>(V2))) {
 
       // Find the element type of the returned vector
-      const Type *EltTy = VTy->getElementType();
+      Type *EltTy = VTy->getElementType();
       unsigned NumElem = VTy->getNumElements();
       std::vector<Constant*> Res(NumElem);
 
@@ -834,7 +834,7 @@ static Constant *GetVectorElement(Constant *C, unsigned EltNo) {
   if (ConstantVector *CV = dyn_cast<ConstantVector>(C))
     return CV->getOperand(EltNo);
 
-  const Type *EltTy = cast<VectorType>(C->getType())->getElementType();
+  Type *EltTy = cast<VectorType>(C->getType())->getElementType();
   if (isa<ConstantAggregateZero>(C))
     return Constant::getNullValue(EltTy);
   if (isa<UndefValue>(C))
@@ -850,7 +850,7 @@ Constant *llvm::ConstantFoldShuffleVectorInstruction(Constant *V1,
 
   unsigned MaskNumElts = cast<VectorType>(Mask->getType())->getNumElements();
   unsigned SrcNumElts = cast<VectorType>(V1->getType())->getNumElements();
-  const Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
+  Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
 
   // Loop over the shuffle mask, evaluating each element.
   SmallVector<Constant*, 32> Result;
@@ -922,16 +922,16 @@ Constant *llvm::ConstantFoldInsertValueInstruction(Constant *Agg,
     
     // Otherwise break the aggregate undef into multiple undefs and do
     // the insertion.
-    const CompositeType *AggTy = cast<CompositeType>(Agg->getType());
+    CompositeType *AggTy = cast<CompositeType>(Agg->getType());
     unsigned numOps;
-    if (const ArrayType *AR = dyn_cast<ArrayType>(AggTy))
+    if (ArrayType *AR = dyn_cast<ArrayType>(AggTy))
       numOps = AR->getNumElements();
     else
       numOps = cast<StructType>(AggTy)->getNumElements();
     
     std::vector<Constant*> Ops(numOps); 
     for (unsigned i = 0; i < numOps; ++i) {
-      const Type *MemberTy = AggTy->getTypeAtIndex(i);
+      Type *MemberTy = AggTy->getTypeAtIndex(i);
       Constant *Op =
         (Idxs[0] == i) ?
         ConstantFoldInsertValueInstruction(UndefValue::get(MemberTy),
@@ -940,7 +940,7 @@ Constant *llvm::ConstantFoldInsertValueInstruction(Constant *Agg,
       Ops[i] = Op;
     }
     
-    if (const StructType* ST = dyn_cast<StructType>(AggTy))
+    if (StructType* ST = dyn_cast<StructType>(AggTy))
       return ConstantStruct::get(ST, Ops);
     return ConstantArray::get(cast<ArrayType>(AggTy), Ops);
   }
@@ -953,16 +953,16 @@ Constant *llvm::ConstantFoldInsertValueInstruction(Constant *Agg,
     
     // Otherwise break the aggregate zero into multiple zeros and do
     // the insertion.
-    const CompositeType *AggTy = cast<CompositeType>(Agg->getType());
+    CompositeType *AggTy = cast<CompositeType>(Agg->getType());
     unsigned numOps;
-    if (const ArrayType *AR = dyn_cast<ArrayType>(AggTy))
+    if (ArrayType *AR = dyn_cast<ArrayType>(AggTy))
       numOps = AR->getNumElements();
     else
       numOps = cast<StructType>(AggTy)->getNumElements();
     
     std::vector<Constant*> Ops(numOps);
     for (unsigned i = 0; i < numOps; ++i) {
-      const Type *MemberTy = AggTy->getTypeAtIndex(i);
+      Type *MemberTy = AggTy->getTypeAtIndex(i);
       Constant *Op =
         (Idxs[0] == i) ?
         ConstantFoldInsertValueInstruction(Constant::getNullValue(MemberTy),
@@ -971,7 +971,7 @@ Constant *llvm::ConstantFoldInsertValueInstruction(Constant *Agg,
       Ops[i] = Op;
     }
     
-    if (const StructType *ST = dyn_cast<StructType>(AggTy))
+    if (StructType *ST = dyn_cast<StructType>(AggTy))
       return ConstantStruct::get(ST, Ops);
     return ConstantArray::get(cast<ArrayType>(AggTy), Ops);
   }
@@ -986,7 +986,7 @@ Constant *llvm::ConstantFoldInsertValueInstruction(Constant *Agg,
       Ops[i] = Op;
     }
     
-    if (const StructType* ST = dyn_cast<StructType>(Agg->getType()))
+    if (StructType* ST = dyn_cast<StructType>(Agg->getType()))
       return ConstantStruct::get(ST, Ops);
     return ConstantArray::get(cast<ArrayType>(Agg->getType()), Ops);
   }
@@ -1265,13 +1265,13 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
         return ConstantFP::get(C1->getContext(), C3V);
       }
     }
-  } else if (const VectorType *VTy = dyn_cast<VectorType>(C1->getType())) {
+  } else if (VectorType *VTy = dyn_cast<VectorType>(C1->getType())) {
     ConstantVector *CP1 = dyn_cast<ConstantVector>(C1);
     ConstantVector *CP2 = dyn_cast<ConstantVector>(C2);
     if ((CP1 != NULL || isa<ConstantAggregateZero>(C1)) &&
         (CP2 != NULL || isa<ConstantAggregateZero>(C2))) {
       std::vector<Constant*> Res;
-      const Type* EltTy = VTy->getElementType();  
+      Type* EltTy = VTy->getElementType();  
       Constant *C1 = 0;
       Constant *C2 = 0;
       switch (Opcode) {
@@ -1461,8 +1461,8 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
 
 /// isZeroSizedType - This type is zero sized if its an array or structure of
 /// zero sized types.  The only leaf zero sized type is an empty structure.
-static bool isMaybeZeroSizedType(const Type *Ty) {
-  if (const StructType *STy = dyn_cast<StructType>(Ty)) {
+static bool isMaybeZeroSizedType(Type *Ty) {
+  if (StructType *STy = dyn_cast<StructType>(Ty)) {
     if (STy->isOpaque()) return true;  // Can't say.
 
     // If all of elements have zero size, this does too.
@@ -1470,7 +1470,7 @@ static bool isMaybeZeroSizedType(const Type *Ty) {
       if (!isMaybeZeroSizedType(STy->getElementType(i))) return false;
     return true;
 
-  } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
+  } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
     return isMaybeZeroSizedType(ATy->getElementType());
   }
   return false;
@@ -1483,7 +1483,7 @@ static bool isMaybeZeroSizedType(const Type *Ty) {
 /// first is less than the second, return -1, if the second is less than the
 /// first, return 1.  If the constants are not integral, return -2.
 ///
-static int IdxCompare(Constant *C1, Constant *C2, const Type *ElTy) {
+static int IdxCompare(Constant *C1, Constant *C2, Type *ElTy) {
   if (C1 == C2) return 0;
 
   // Ok, we found a different index.  If they are not ConstantInt, we can't do
@@ -1832,8 +1832,8 @@ static ICmpInst::Predicate evaluateICmpRelation(Constant *V1, Constant *V2,
 
 Constant *llvm::ConstantFoldCompareInstruction(unsigned short pred, 
                                                Constant *C1, Constant *C2) {
-  const Type *ResultTy;
-  if (const VectorType *VT = dyn_cast<VectorType>(C1->getType()))
+  Type *ResultTy;
+  if (VectorType *VT = dyn_cast<VectorType>(C1->getType()))
     ResultTy = VectorType::get(Type::getInt1Ty(C1->getContext()),
                                VT->getNumElements());
   else
@@ -2174,8 +2174,8 @@ static Constant *ConstantFoldGetElementPtrImpl(Constant *C,
     return C;
 
   if (isa<UndefValue>(C)) {
-    const PointerType *Ptr = cast<PointerType>(C->getType());
-    const Type *Ty = GetElementPtrInst::getIndexedType(Ptr, Idxs, Idxs+NumIdx);
+    PointerType *Ptr = cast<PointerType>(C->getType());
+    Type *Ty = GetElementPtrInst::getIndexedType(Ptr, Idxs, Idxs+NumIdx);
     assert(Ty != 0 && "Invalid indices for GEP!");
     return UndefValue::get(PointerType::get(Ty, Ptr->getAddressSpace()));
   }
@@ -2188,8 +2188,8 @@ static Constant *ConstantFoldGetElementPtrImpl(Constant *C,
         break;
       }
     if (isNull) {
-      const PointerType *Ptr = cast<PointerType>(C->getType());
-      const Type *Ty = GetElementPtrInst::getIndexedType(Ptr, Idxs,
+      PointerType *Ptr = cast<PointerType>(C->getType());
+      Type *Ty = GetElementPtrInst::getIndexedType(Ptr, Idxs,
                                                          Idxs+NumIdx);
       assert(Ty != 0 && "Invalid indices for GEP!");
       return ConstantPointerNull::get(PointerType::get(Ty,
@@ -2203,7 +2203,7 @@ static Constant *ConstantFoldGetElementPtrImpl(Constant *C,
     // getelementptr instructions into a single instruction.
     //
     if (CE->getOpcode() == Instruction::GetElementPtr) {
-      const Type *LastTy = 0;
+      Type *LastTy = 0;
       for (gep_type_iterator I = gep_type_begin(CE), E = gep_type_end(CE);
            I != E; ++I)
         LastTy = *I;
@@ -2219,9 +2219,9 @@ static Constant *ConstantFoldGetElementPtrImpl(Constant *C,
         Constant *Combined = CE->getOperand(CE->getNumOperands()-1);
         // Otherwise it must be an array.
         if (!Idx0->isNullValue()) {
-          const Type *IdxTy = Combined->getType();
+          Type *IdxTy = Combined->getType();
           if (IdxTy != Idx0->getType()) {
-            const Type *Int64Ty = Type::getInt64Ty(IdxTy->getContext());
+            Type *Int64Ty = Type::getInt64Ty(IdxTy->getContext());
             Constant *C1 = ConstantExpr::getSExtOrBitCast(Idx0, Int64Ty);
             Constant *C2 = ConstantExpr::getSExtOrBitCast(Combined, Int64Ty);
             Combined = ConstantExpr::get(Instruction::Add, C1, C2);
@@ -2249,10 +2249,10 @@ static Constant *ConstantFoldGetElementPtrImpl(Constant *C,
     // To: i32* getelementptr ([3 x i32]* %X, i64 0, i64 0)
     //
     if (CE->isCast() && NumIdx > 1 && Idx0->isNullValue()) {
-      if (const PointerType *SPT =
+      if (PointerType *SPT =
           dyn_cast<PointerType>(CE->getOperand(0)->getType()))
-        if (const ArrayType *SAT = dyn_cast<ArrayType>(SPT->getElementType()))
-          if (const ArrayType *CAT =
+        if (ArrayType *SAT = dyn_cast<ArrayType>(SPT->getElementType()))
+          if (ArrayType *CAT =
         dyn_cast<ArrayType>(cast<PointerType>(C->getType())->getElementType()))
             if (CAT->getElementType() == SAT->getElementType())
               return inBounds ?
@@ -2268,12 +2268,12 @@ static Constant *ConstantFoldGetElementPtrImpl(Constant *C,
   // out into preceding dimensions.
   bool Unknown = false;
   SmallVector<Constant *, 8> NewIdxs;
-  const Type *Ty = C->getType();
-  const Type *Prev = 0;
+  Type *Ty = C->getType();
+  Type *Prev = 0;
   for (unsigned i = 0; i != NumIdx;
        Prev = Ty, Ty = cast<CompositeType>(Ty)->getTypeAtIndex(Idxs[i]), ++i) {
     if (ConstantInt *CI = dyn_cast<ConstantInt>(Idxs[i])) {
-      if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty))
+      if (ArrayType *ATy = dyn_cast<ArrayType>(Ty))
         if (ATy->getNumElements() <= INT64_MAX &&
             ATy->getNumElements() != 0 &&
             CI->getSExtValue() >= (int64_t)ATy->getNumElements()) {