diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -4500,6 +4500,7 @@
     MVT ContainerVT = getContainerForFixedLengthVector(VecVT);
     SDLoc DL(Op);
     auto [Mask, VL] = getDefaultVLOps(VecVT, ContainerVT, DL, DAG, Subtarget);
+    (void)Mask;
 
     SDValue Res =
         splatPartsI64WithVL(DL, ContainerVT, SDValue(), Lo, Hi, VL, DAG);