Cream the butter or margarine until soft; add eggs and beat just until blended.
Stir in pineapple, vanilla and 1 cup chopped nuts.
Sift together flour, baking powder, soda, Splenda and salt; stir sifted mixture into pineapple mixture just until blended.
Spoon batter into a well buttered loaf pan.
Combine topping ingredients and sprinkle over batter.
Bake for about 1 hour; To test for doneness, stick a toothpick into the center of the loaf, bread is done when it comes out clean; start checking after 45 minutes as cooking time can be less or more than 1 hour depending on liquid content of the pineapple which will vary.