Request for reviews (S): 6930116: loop predication code does not handle If nodes with only one projection

[Vladimir Kozlov]

Thanks, Tom

Vladimir

Tom Rodriguez wrote:
> Looks good.
> 
> tom
> 
> On Feb 25, 2010, at 7:13 PM, Vladimir Kozlov wrote:
> 
>> http://cr.openjdk.java.net/~kvn/6930116/webrev
>>
>> Fixed 6930116: loop predication code does not handle If nodes with only one projection
>>
>> Problem:
>> Loop predication codes expects all If nodes have 2 projections which
>> could be not true for some dead paths.
>>
>> Solution:
>> Add check for iff->outcnt() < 2.
>>
>> Reviewed by:
>>
>> Fix verified (y/n): y
>>
>> Other testing:
>> JPRT
>>
>> I did not find where such If came from but other places has such check.
>> It could came from some loop optimization and was not removed since
>> IGVN cleaning code was not run yet (it is done at the end of all
>> loop optimizations).
>>
>