It depends on the definition of warm up sets. When I train, sometimes i like to go Yates style. Ex: First warm up set on bench (and it doesnt have to be on the first exercise), 145, then 225, and during these sets, im ensuring to use strict form and mind muscle connection and just gauging how everything feels. Final set i up the weight to 365 or more for one all out set balls to wall. Training like this you need a spotter because the last set should be heavy enough to where you should only br able to get at most 8 reps.
Anywho, like I said it depends on how it is defined.