RFR: 8366461: Remove obsolete method handle invoke logic [v3]

[Dean Long]

On Thu, 25 Sep 2025 06:48:52 GMT, Manuel Hässig <mhaessig at openjdk.org> wrote:

> I would rather keep this code as a debug only sanity check, but I would refactor it into a single function. Then the question remains what to do with the SA code, that still does nothing.

I think we can do even better and get rid of adjust_unextended_sp, moving the debug check into get_deopt_original_pc.  This moves the SA changes into shared code, and fixes the anomaly that s390 never called adjust_unextended_sp and thus never called the debug code to do the sanity check.

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

PR Review Comment: https://git.openjdk.org/jdk/pull/27059#discussion_r2380422777