Black Forest Dump Cake

1 - 8 ounce can crushed pineapple 1 -21 ounce can cherry pie filling 1 pkg. Devils food cake mix 1 cup Millican Pecan Pieces 1/2 cup margarine Cool whip Drain pineapple, save liquid. Spread pineapple in lightly greased 9 X 13 X 2 pan. Add pie filling, spreading gently. Sprinkle dry cake mix on pie filling; top with pecans. Combine margarine & pineapple juice, drizzle on mixture. Bake at 350 degrees for 35 -40 minutes. Cut into squares; top with whipped topping.