RFR: 8365017: The SegmentBulkOperations::copy method can be improved using overlaps [v4]

[Per Minborg]

On Fri, 8 Aug 2025 16:04:44 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update copyright year
>
> src/java.base/share/classes/jdk/internal/foreign/AbstractMemorySegmentImpl.java line 266:
> 
>> 264: 
>> 265:             // The below computation is a branchless equivalent to
>> 266:             // `return (thisStart < thatEnd && thisEnd > thatStart)?1:0;`. Here is how:
> 
> It would be pretty cool if C2 could do the optimization of branch-less computations like these.

Yes. My thought as well. I will make some inquiries.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26672#discussion_r2265780689