Index: llvm/include/llvm/IR/DerivedTypes.h
===================================================================
--- llvm/include/llvm/IR/DerivedTypes.h
+++ llvm/include/llvm/IR/DerivedTypes.h
@@ -519,8 +519,7 @@
   /// input type and the same element type.
   static VectorType *getDoubleElementsVectorType(VectorType *VTy) {
     auto EltCnt = VTy->getElementCount();
-    assert((VTy->getNumElements() * 2ull) <= UINT_MAX &&
-           "Too many elements in vector");
+    assert((EltCnt.Min * 2ull) <= UINT_MAX && "Too many elements in vector");
     return VectorType::get(VTy->getElementType(), EltCnt*2);
   }