Ef lens with adapter to R

Hello, I have a question. I am planning on buying a lens which is EF that I want to be able to use with my when I buy Canon R camera. Will ot affect to the quality of the image? Or will I see any crop? Or since EF it is made for fullframe it will adapt perfectly with the adapter? The lens I want to get is tamron sp 70 200 f 2.8 di vc usd g2. With a non fullframe camera. And when I get my mirrorless one I want to be able to use it normally! Does this work? Thank you!!