This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

RE: [Patch PR44576]: Don't do further analysis if we could know prefetching is not benefitial




Am Freitag 09 Juli 2010, 03:15:26 schrieb Fang, Changpeng:
>> +  /* FIXME: the time should be weighted by the probabilities of the blocks in
>> +     the loop body.  */
>> +  time = tree_num_loop_insns (loop, &eni_time_weights);
>> +  ahead = (PREFETCH_LATENCY + time - 1) / time;

>Here I sometimes get a division by zero.

That should not happen (time couldn't be zero). Would you please double check and give a testcase to show the problem
if possible?

Thanks,

Changpeng




Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]