It's generally a good idea to use a trainer tire for a trainer, because the tire wears down significantly faster (plus they get hotter, make more noise, etc).
Rollers don't cause as much tire wear as a trainer does, but they aren't exactly the road. Many people use their regular road tires on them without any adverse effects. Some people experience increased wear (on the back, usually).
If you're really worried though, just buy some cheap 15 dollar tires and put them on your wheels. On a trainer, they wont last as long as a trainer tire but they will save your good tires. On rollers, you generally have less wear, but still, you're going to save your original tires (since they aren't being used).