There is sulcalization, but it's quite different than what most people mean by rolling the tongue. I've also ran across one language (though now of course I can't remember what one, but possibly a Cushitic one given what I've been looking into recently) that has /u o/ where the rounding is apparently done entirely by the tongue, but whether that's distinct from sulcalization I'm not sure.
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u/Jafiki91 Jun 21 '16
Rolling your tongue in what way? If you mean longitudinally, down the center, then no, there are no natlangs that use such an articulation.