Preheat oven to 375°. Press half of crescent rolls together over bottom of a lightly greased 2-quart baking dish.
Add cherry pie filling, spreading evenly.
Top with remaining crescent rolls, arranging them evenly over top. Sprinkle with sugar if desired.
Bake 30-40 minutes, until filling is hot and bubbling up through top crust. Check during last 10-15 minutes; if top browns too quickly, cover loosely with foil.
Serve with a scoop of vanilla ice cream.