Incorrect DFA scheduling of output dependency.

[Daniel Berlin]

>> FSFChangeLog.11:        * combine.c (try_combine): Clear reg_n_refs if i2dest is not
>> haifa-sched.c:   be correct.  Namely: reg_n_refs, reg_n_sets, reg_n_deaths,
>> sched-deps.c:     Otherwise, the reg_n_refs info (which depends on loop_depth) would
>>
>> So even in the ChangeLogs there is only one reference to reg_n_regs.
>>
>> Is this bitrot?
> reg_n_refs got moved into the reg_info_def structure along with most of
> the other information related to registers.  The comment needs updating.
> jeff

Just to followup, it's now REG_N_REFS, defined in regs.h

--Dan