diff --git a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
--- a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
@@ -944,11 +944,7 @@
     SmallVector<llvm::Metadata *> scopeMDs;
     for (SymbolRefAttr scopeRef : scopes.getAsRange<SymbolRefAttr>())
       scopeMDs.push_back(getAliasScope(*op, scopeRef));
-    llvm::MDNode *unionMD = nullptr;
-    if (scopeMDs.size() == 1)
-      unionMD = llvm::cast<llvm::MDNode>(scopeMDs.front());
-    else if (scopeMDs.size() >= 2)
-      unionMD = llvm::MDNode::get(module->getContext(), scopeMDs);
+    llvm::MDNode *unionMD = llvm::MDNode::get(module->getContext(), scopeMDs);
     inst->setMetadata(module->getMDKindID(llvmMetadataName), unionMD);
   };
 
diff --git a/mlir/test/Target/LLVMIR/llvmir.mlir b/mlir/test/Target/LLVMIR/llvmir.mlir
--- a/mlir/test/Target/LLVMIR/llvmir.mlir
+++ b/mlir/test/Target/LLVMIR/llvmir.mlir
@@ -1653,9 +1653,12 @@
 
 // Metadata
 // CHECK-DAG: ![[DOMAIN:[0-9]+]] = distinct !{![[DOMAIN]], !"The domain"}
-// CHECK-DAG: ![[SCOPE1]] = distinct !{![[SCOPE1]], ![[DOMAIN]], !"The first scope"}
-// CHECK-DAG: ![[SCOPE2]] = distinct !{![[SCOPE2]], ![[DOMAIN]]}
-// CHECK-DAG: ![[SCOPE3]] = distinct !{![[SCOPE3]], ![[DOMAIN]]}
+// CHECK-DAG: ![[SCOPE1_NODE:[0-9]+]] = distinct !{![[SCOPE1_NODE]], ![[DOMAIN]], !"The first scope"}
+// CHECK-DAG: ![[SCOPE2_NODE:[0-9]+]] = distinct !{![[SCOPE2_NODE]], ![[DOMAIN]]}
+// CHECK-DAG: ![[SCOPE3_NODE:[0-9]+]] = distinct !{![[SCOPE3_NODE]], ![[DOMAIN]]}
+// CHECK-DAG: ![[SCOPE1]] = !{![[SCOPE1_NODE]]}
+// CHECK-DAG: ![[SCOPE2]] = !{![[SCOPE2_NODE]]}
+// CHECK-DAG: ![[SCOPE3]] = !{![[SCOPE3_NODE]]}
 // CHECK-DAG: ![[SCOPES12]] = !{![[SCOPE1]], ![[SCOPE2]]}
 // CHECK-DAG: ![[SCOPES13]] = !{![[SCOPE1]], ![[SCOPE3]]}
 // CHECK-DAG: ![[SCOPES23]] = !{![[SCOPE2]], ![[SCOPE3]]}