diff --git a/llvm/lib/Transforms/Utils/FunctionComparator.cpp b/llvm/lib/Transforms/Utils/FunctionComparator.cpp
--- a/llvm/lib/Transforms/Utils/FunctionComparator.cpp
+++ b/llvm/lib/Transforms/Utils/FunctionComparator.cpp
@@ -329,8 +329,8 @@
   case Value::ConstantVectorVal: {
     const ConstantVector *LV = cast<ConstantVector>(L);
     const ConstantVector *RV = cast<ConstantVector>(R);
-    unsigned NumElementsL = cast<VectorType>(TyL)->getNumElements();
-    unsigned NumElementsR = cast<VectorType>(TyR)->getNumElements();
+    unsigned NumElementsL = cast<FixedVectorType>(TyL)->getNumElements();
+    unsigned NumElementsR = cast<FixedVectorType>(TyR)->getNumElements();
     if (int Res = cmpNumbers(NumElementsL, NumElementsR))
       return Res;
     for (uint64_t i = 0; i < NumElementsL; ++i) {
diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -888,7 +888,7 @@
                           unsigned Op,
                           RecurrenceDescriptor::MinMaxRecurrenceKind MinMaxKind,
                           ArrayRef<Value *> RedOps) {
-  unsigned VF = cast<VectorType>(Src->getType())->getNumElements();
+  unsigned VF = cast<FixedVectorType>(Src->getType())->getNumElements();
 
   // Extract and apply reduction ops in ascending order:
   // e.g. ((((Acc + Scl[0]) + Scl[1]) + Scl[2]) + ) ... + Scl[VF-1]
@@ -918,7 +918,7 @@
 llvm::getShuffleReduction(IRBuilderBase &Builder, Value *Src, unsigned Op,
                           RecurrenceDescriptor::MinMaxRecurrenceKind MinMaxKind,
                           ArrayRef<Value *> RedOps) {
-  unsigned VF = cast<VectorType>(Src->getType())->getNumElements();
+  unsigned VF = cast<FixedVectorType>(Src->getType())->getNumElements();
   // VF is a power of 2 so we can emit the reduction using log2(VF) shuffles
   // and vector ops, reducing the set of values being computed by half each
   // round.