[10] RFR(XS) 8185013: Disable subword vector analysis optimization until 8184995 is fixed

[Daniel D. Daugherty]

Agreed. Sorry, I usually say up front when I think a change
qualifies for the "HotSpot Trivial Change" rule... :-)

Dan


On 7/20/17 4:51 PM, Vladimir Kozlov wrote:
> Thank you, Dan.
>
> I think one reviewer is enough for this. I am pushing it.
>
> Vladimir
>
> On 7/20/17 3:47 PM, Daniel D. Daugherty wrote:
>> Thumbs up!
>>
>> Dan
>>
>>
>> On 7/20/17 4:44 PM, Vladimir Kozlov wrote:
>>> https://bugs.openjdk.java.net/browse/JDK-8185013
>>>
>>> Switch UseSubwordForMaxVector flag off by default.
>>>
>>> src/share/vm/opto/c2_globals.hpp
>>> @@ -192,7 +192,7 @@
>>>            "of rounds of 
>>> unroll,optimize,..")                          \
>>>            range(0, 
>>> max_jint)                                          \
>>>                                                                        
>>> \
>>> -  product(bool, UseSubwordForMaxVector, 
>>> true,                         \
>>> +  product(bool, UseSubwordForMaxVector, 
>>> false,                        \
>>>            "Use Subword Analysis to set maximum vector 
>>> size")          \
>>>                                                                        
>>> \
>>>    develop(intx, UnrollLimitForProfileCheck, 
>>> 1,                        \
>>>
>>> Thanks,
>>> Vladimir
>>
>