diff --git a/llvm/include/llvm/IR/DerivedTypes.h b/llvm/include/llvm/IR/DerivedTypes.h
--- a/llvm/include/llvm/IR/DerivedTypes.h
+++ b/llvm/include/llvm/IR/DerivedTypes.h
@@ -539,6 +539,10 @@
 public:
   static FixedVectorType *get(Type *ElementType, unsigned NumElts);
 
+  static FixedVectorType *get(Type *ElementType, const FixedVectorType *FVTy) {
+    return get(ElementType, FVTy->getNumElements());
+  }
+
   static bool classof(const Type *T) {
     return T->getTypeID() == FixedVectorTyID;
   }
@@ -553,6 +557,11 @@
 public:
   static ScalableVectorType *get(Type *ElementType, unsigned MinNumElts);
 
+  static ScalableVectorType *get(Type *ElementType,
+                                 const ScalableVectorType *SVTy) {
+    return get(ElementType, SVTy->getMinNumElements());
+  }
+
   /// Get the minimum number of elements in this vector. The actual number of
   /// elements in the vector is an integer multiple of this value.
   uint64_t getMinNumElements() const { return ElementQuantity; }