[aarch64-port-dev ] RFR [sh/8u]: Revert accidental OpSpinWait matching

[Aleksey Shipilev]

Ping.

-Aleksey

On 04/25/2018 09:35 AM, Aleksey Shipilev wrote:
> Now that the merge came in, ping?
> 
> -Aleksey
> 
> On 03/22/2018 12:06 PM, Aleksey Shipilev wrote:
>> We have a weird difference between our sh/jdk8 development repo and aarch64-port-jdk8u-shenandoah
>> integration forest: it has a little branch that "matches" OpSpinWait, even though there is no such
>> node in 8u at all -- that feature came in JDK 9. This had accidentally leaked during previous merges.
>>
>> So, we want to push this to aarch64-port/jdk8u-shenandoah:
>>
>> diff -r 966a10251cb4 src/share/vm/adlc/formssel.cpp
>> --- a/src/share/vm/adlc/formssel.cpp	Wed Mar 21 20:00:58 2018 +0000
>> +++ b/src/share/vm/adlc/formssel.cpp	Thu Mar 22 12:03:44 2018 +0100
>> @@ -4066,8 +4066,7 @@
>>      !strcmp(_opType,"StoreFence") ||
>>      !strcmp(_opType,"MemBarVolatile") ||
>>      !strcmp(_opType,"MemBarCPUOrder") ||
>> -    !strcmp(_opType,"MemBarStoreStore") ||
>> -    !strcmp(_opType, "OnSpinWait");
>> +    !strcmp(_opType,"MemBarStoreStore");
>>  }
>>
>>  bool MatchRule::is_ideal_loadPC() const {
>>
>> Testing: x86_64 build, hotspot_gc_shenandoah
>>
>> Thanks,
>> -Aleksey
>>
> 
>