RFR: 8345217: Parallel: Refactor PSParallelCompact::next_src_region

[Stefan Johansson]

On Thu, 28 Nov 2024 15:22:33 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple removing some unnecessary calculations in locating the next source-region during full-gc.
> 
> Test: tier1-5

Marked as reviewed by sjohanss (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/22441#pullrequestreview-2488566791