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

[Roman Kennke]

Looks good to me.

Am 30. April 2018 10:27:58 MESZ schrieb Aleksey Shipilev <shade at redhat.com>:
>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
>>>
>> 
>> 

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