regstat_init_n_sets_and_refs from the current values of
DF_REG_DEF_COUNT and DF_REG_USE_COUNT. REG_N_REFS and REG_N_SETS
should only be used if a pass need to change these values in some
- magical way or or the pass needs to have accurate values for these
+ magical way or the pass needs to have accurate values for these
and is not using incremental df scanning.
At the end of a pass that uses REG_N_REFS and REG_N_SETS, a call