RFR: 8266819: Separate the stop policies from the compile policies completely

[Maurizio Cimadamore]

I've added a description re. compatibility risk, and also added myself 
as reviewer. You can finalize.

Also, please use the `/csr` PR command on github, which will link the PR 
to the CSR.

Thanks
Maurizio

On 11/05/2021 16:45, Guoxiong Li wrote:
> On Tue, 11 May 2021 00:43:05 GMT, Guoxiong Li <gli at openjdk.org> wrote:
>
>> Hi all,
>>
>> This patch removes the compile policies `ATTR_ONLY` and `CHECK_ONLY` so that the compile policies can be separated from the stop policies. And some corresponding tests need to be adjusted, too.
>>
>> Please see [JDK-8266819](https://bugs.openjdk.java.net/browse/JDK-8266819) and the [original discussion](https://mail.openjdk.java.net/pipermail/compiler-dev/2021-May/016759.html) for more information.
>>
>> Thank you for taking the time to review.
>>
>> Best Regards,
>> -- Guoxiong
> I created the CSR. Please see [JDK-8266920](https://bugs.openjdk.java.net/browse/JDK-8266920).
>
> -------------
>
> PR: https://git.openjdk.java.net/jdk/pull/3961