Banana Cake

3/4 cup (1 1/2) sticks unsalted butter
1 1/2 cups granulated sugar
1/2 teaspoon salt
2 large eggs
2 cups self-rising flour
1/2 teaspoon baking soda
1/2 teaspoon baking powder
3 ripe bananas, mashed
1 1/2 teaspoons vanilla extract
1/3 cup chopped pecans
1/3 cup raisins
1/3 cup chopped dates
2 cups sifted confectioners