RFR(M) 8201447: C1 does backedge profiling incorrectly

[Igor Veresov]

Thanks Tom and Vladimir!

igor

> On May 15, 2018, at 6:32 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> 
> +1
> 
> Vladimir K
> 
>> On May 15, 2018, at 4:53 PM, Tom Rodriguez <tom.rodriguez at oracle.com> wrote:
>> 
>> Looks good.
>> 
>> tom
>> 
>> Igor Veresov wrote:
>>> C1 incorrectly incremented a back branch counter for both arms of a conditional branch if one of the arms were a back branch. This fix makes the increment conditional and applicable only to the appropriate arm.
>>> Webrev: http://cr.openjdk.java.net/~iveresov/8201447/webrev.01/
>>> Internal performance testing showed no adverse effects of the change.
>>> Thanks,
>>> igor
>