[SVE] Remove getNumElements() calls in Verifier::visitIntrinsicCall

[david-arm]

Summary

Replace getNumElements() with getElementCount() when asserting that
two types have the same element counts.

llvm/lib/IR/Verifier.cpp

Assert(Alignment->getValue().isPowerOf2(),
            "masked_load: alignment must be a power of 2", Call);
 
     // DataTy is the overloaded type
     Type *DataTy = cast<PointerType>(Ptr->getType())->getElementType();
     Assert(DataTy == Call.getType(),
            "masked_load: return must match pointer type", Call);
     Assert(PassThru->getType() == DataTy,
            "masked_load: pass through and data type must match", Call);
-    Assert(cast<VectorType>(Mask->getType())->getNumElements() ==
-               cast<VectorType>(DataTy)->getNumElements(),
+    Assert(cast<VectorType>(Mask->getType())->getElementCount() ==
+               cast<VectorType>(DataTy)->getElementCount(),
            "masked_load: vector mask must be same length as data", Call);
     break;
   }
   case Intrinsic::masked_store: {
     Value *Val = Call.getArgOperand(0);
     Value *Ptr = Call.getArgOperand(1);
     ConstantInt *Alignment = cast<ConstantInt>(Call.getArgOperand(2));
     Value *Mask = Call.getArgOperand(3);
     Assert(Mask->getType()->isVectorTy(), "masked_store: mask must be vector",
            Call);
     Assert(Alignment->getValue().isPowerOf2(),
            "masked_store: alignment must be a power of 2", Call);
 
     // DataTy is the overloaded type
     Type *DataTy = cast<PointerType>(Ptr->getType())->getElementType();
     Assert(DataTy == Val->getType(),
            "masked_store: storee must match pointer type", Call);
-    Assert(cast<VectorType>(Mask->getType())->getNumElements() ==
-               cast<VectorType>(DataTy)->getNumElements(),
+    Assert(cast<VectorType>(Mask->getType())->getElementCount() ==
+               cast<VectorType>(DataTy)->getElementCount(),
            "masked_store: vector mask must be same length as data", Call);
     break;
   }
 
   case Intrinsic::masked_gather: {
     const APInt &Alignment =
         cast<ConstantInt>(Call.getArgOperand(1))->getValue();
     Assert(Alignment.isNullValue() || Alignment.isPowerOf2(),