RFR: 8342239: GenShen: Revert changes in adaptive heuristic to avoid overflow on 32 bit

[Y. Srinivas Ramakrishna]

On Tue, 15 Oct 2024 20:46:11 GMT, William Kemper <wkemper at openjdk.org> wrote:

> One of our changes to increase precision comes with the risk of overflow on 32 bit platforms. We're going to revert it for safety's sake.

Marked as reviewed by ysr (Committer).

-------------

PR Review: https://git.openjdk.org/shenandoah/pull/513#pullrequestreview-2373556057