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Re: [PATCH] Ensure count_scale is no larger than REG_BR_PROB_BASE


Do you mean adjusting bb->count? Because in
expand_call_inline(tree-inline.c), it will use bb->count to pass into
copy_body to calculate count_scale.

Thanks,
Dehao

On Fri, May 16, 2014 at 5:22 PM, Jan Hubicka <hubicka@ucw.cz> wrote:
>> In AutoFDO, a basic block's count can be much larger than it's actual
>> count because debug info might be incorrect. In this case, a call edge
>> count (calculated from BB count) could be much larger than callee's
>> header count, making the count_scale incorrectly large.
>
> In this case I still think we should handle this when producing the clone:
> we do not want to have clone's count much larger as well, so i think inliner
> and ipa-cp needs to deal with capping here instead....
>
> Honza
>>
>> Dehao
>> >
>> >
>> > Honza


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