[Altera] How to infer some code into ROM-blocks (in automatic way), but not all

Hi. My qustion is probably dumb. But i'm stuck here. In my design I have a lot of code that can be inferred into ROM automatically, and it does. However, my device doesn't have enough ROM blocks. My question: is it possible by Quartus to infer some code into ROM blocks when it is possible and all the rest let him to make synthesis using ALUTs? Or should I manually divide all my ROM-like code to what will inferred into ROM blocks and that part which will be done usign ALUTs?