[mlir][arith] Fix -Wunused-but-set-variable

diff --git a/mlir/lib/Dialect/Vector/Utils/VectorUtils.cpp b/mlir/lib/Dialect/Vector/Utils/VectorUtils.cpp
index f6b4cd0..ba05b03 100644 (file)
--- a/mlir/lib/Dialect/Vector/Utils/VectorUtils.cpp
+++ b/mlir/lib/Dialect/Vector/Utils/VectorUtils.cpp
@@ -166,6 +166,7 @@ static AffineMap makePermutationMap(
             countInvariantIndices == numIndices - 1) &&
            "Vectorization prerequisite violated: at most 1 index may be "
            "invariant wrt a vectorized loop");
+    (void)countInvariantIndices;
   }
   return AffineMap::get(indices.size(), 0, perm, context);
 }