RFR: Refactor AOTCodeCache layout to store preload entries separately

[Ashutosh Mehra]

On Fri, 5 Sep 2025 11:08:19 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> UseNewCode should really be folded. It is good for experimentation, but the final commit should just do the new code unconditionally.

Yes, that's the plan. I added `UseNewCode` to make it easier to compare performance. If the patch looks fine, I will update the patch to remove the older version of the functions.

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PR Comment: https://git.openjdk.org/leyden/pull/95#issuecomment-3258490906