In a large bowl, cream the butter, cream cheese and sugar until light and fluffy. Add eggs, one at a time, beating well after each addition. Beat in bananas and vanilla. Combine the flour, baking powder, baking soda and salt; gradually add to creamed mixture. Fold in 1 cup pecans. Transfer to two greased 8 inch x 4 inch loaf pans. Sprinkle with remaining pecans. Bake at 350 degrees for 1 to 1-1/4 hours or until a toothpick inserted near the center comes out clean. In a small bowl, whisk the glaze ingredients; drizzle over loaves. Cool for 10 minutes before removeing from pan.