Once an object passes through the horizon of a black hole, the singularity (the point at the center of the black hole where all the mass is) is always in its future; it can not be avoided. So all matter which enters the horizon of a black hole ends up at the singularity, a point in space with zero size.
Obviously any physical object will be crushed. Before that, however, objects will be stretched by gravitational tidal forces because the force from gravity acts more strongly on the parts of the objects closest to the singularity. For example, say you were falling feet first into a black hole. Your feet are closer to the singularity, so the force from gravity on your feet is much stronger than the gravitational force acting on your head. This would stretch you, and these forces can be extremely strong.