RFR: 8258946: Fix optimization-unstable code involving signed integer overflow [v2]

[Hao Sun]

On Mon, 4 Jan 2021 18:28:23 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Hao Sun has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update the copyright year to 2021
>>   
>>   Update the copyright year to 2021.
>>   
>>   Change-Id: If1c44ff5e88accb96367bec64aa58449a97a36e5
>>   CustomizedGitHooks: yes
>
> Good.

Thanks for your review. @vnkozlov and @TobiHartmann 

Since the new commit only updates the copyright year and the pre-submits tests were passed for the first commit (See https://github.com/shqking/jdk/actions/runs/460991763/workflow), I suppose it's ready to merge now.

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PR: https://git.openjdk.java.net/jdk/pull/1900