gcc/ChangeLog:

    * rtl.h (reg_classes_intersect_p): Change return type from int to bool.
    (reg_class_subset_p): Ditto.
    * reginfo.cc (reg_classes_intersect_p): Ditto.
    (reg_class_subset_p): Ditto.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

Uros