diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -5380,7 +5380,8 @@
       return getUNDEF(VT);
 
     // EXTRACT_VECTOR_ELT of out-of-bounds element is an UNDEF
-    if (N2C && N2C->getAPIntValue().uge(N1.getValueType().getVectorNumElements()))
+    if (!N1.getValueType().isScalableVector() &&
+      N2C && N2C->getAPIntValue().uge(N1.getValueType().getVectorNumElements()))
       return getUNDEF(VT);
 
     // EXTRACT_VECTOR_ELT of CONCAT_VECTORS is often formed while lowering is