78       if (_last_cur_val_in_gen[g] == v) {

    78       if (_last_cur_val_in_gen[g] == v) {

    79         seen = true;

    79         seen = true;

    80         break;

    80         break;

    81       }

    81       }

    82     }

    82     }

    84   }

    86   }

    85   ShouldNotReachHere();

    87   ShouldNotReachHere();

    86   return 0;

    88   return 0;

    87 }

    89 }

    88 

    90 

   500       // below, we do some unnecessary scanning

   502       // below, we do some unnecessary scanning

   501       // in some cases in the current parallel scanning algorithm.]

   503       // in some cases in the current parallel scanning algorithm.]

   502       //

   504       //

   503       // The main point below is that the parallel card scanning code

   505       // The main point below is that the parallel card scanning code

   504       // deals correctly with these stale card values. There are two main

   506       // deals correctly with these stale card values. There are two main

   506       // "derivative" case to consider, where we have a stale

   508       // "derivative" case to consider, where we have a stale

   507       // "cur_younger_gen_and_prev_non_clean" value, as will become

   509       // "cur_younger_gen_and_prev_non_clean" value, as will become

   508       // apparent in the case analysis below.

   510       // apparent in the case analysis below.

   509       // o Case 1. If the stale value corresponds to a younger_gen_n

   511       // o Case 1. If the stale value corresponds to a younger_gen_n

   510       //   value other than the cur_younger_gen value then the code

   512       //   value other than the cur_younger_gen value then the code