Gloucester let Friday's Premiership match slip through their fingers late on at Bristol Bears.
A 15th Pro14 win of the season was enough for Leinster to make sure they will be at home in the semi-finals this term.
Joe Schmidt says Johnny Sexton and Joey Carbery should recover from injuries in time to take on France in Dublin.
Ngani Laumape tormented the Brumbies as the Hurricanes dished out a hammering, while the Rebels made it two wins out of two.