Add test case for unranked type

Author: Lewuathe

mlir/test/Dialect/Math/expand-math.mlir

@@ -774,3 +774,16 @@ func.func @non_static_shape_ceil_op(%arg: tensor<?xf32>) -> tensor<?xf32>{
   %a = math.ceil %arg : tensor<?xf32>
   return %a: tensor<?xf32>
 }
+
+// -----
+
+// CHECK-LABEL:    func.func @unranked_ceil_op
+// CHECK-SAME:     (%[[ARG:.*]]: tensor<*xf32>)
+// CHECK-SAME:     -> tensor<*xf32>
+// CHECK:          %[[CEIL:.*]] = math.ceil %[[ARG]] : tensor<*xf32>
+// CHECK:          return %[[CEIL]] : tensor<*xf32>
+
+func.func @unranked_ceil_op(%arg: tensor<*xf32>) -> tensor<*xf32>{
+  %a = math.ceil %arg : tensor<*xf32>
+  return %a: tensor<*xf32>
+}