diff --git a/llvm/lib/Target/Hexagon/HexagonISelLowering.h b/llvm/lib/Target/Hexagon/HexagonISelLowering.h
--- a/llvm/lib/Target/Hexagon/HexagonISelLowering.h
+++ b/llvm/lib/Target/Hexagon/HexagonISelLowering.h
@@ -169,6 +169,8 @@
   bool isExtractSubvectorCheap(EVT ResVT, EVT SrcVT,
       unsigned Index) const override;
 
+  bool isTargetCanonicalConstantNode(SDValue Op) const override;
+
   bool isShuffleMaskLegal(ArrayRef<int> Mask, EVT VT) const override;
   LegalizeTypeAction getPreferredVectorAction(MVT VT) const override;
   LegalizeAction getCustomOperationAction(SDNode &Op) const override;
diff --git a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
--- a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
@@ -2162,6 +2162,11 @@
   return SrcTy.getVectorNumElements() <= 8;
 }
 
+bool HexagonTargetLowering::isTargetCanonicalConstantNode(SDValue Op) const {
+  return Op.getOpcode() == ISD::CONCAT_VECTORS ||
+         TargetLowering::isTargetCanonicalConstantNode(Op);
+}
+
 bool HexagonTargetLowering::isShuffleMaskLegal(ArrayRef<int> Mask,
                                                EVT VT) const {
   return true;