Unfold and stack 2 piecrusts; gently roll or press together. Fit into a 9-inch pieplate according to package directions; fold edges under, and crimp.
Beat cream cheese, 1 egg, 1/2 cup sugar, 1 teaspoon vanilla, and salt at medium speed with an electric mixer until smooth. Pour into piecrust. Sprinkle with pecans.
Stir together corn syrup, remaining eggs, remaining 1/4 cup sugar, and remaining 1 teaspoon vanilla; pour mixture over pecans.
Bake at 350° for 50 to 55 minutes or until set.