RFR: 8347396: Efficient TypeFunc creations [v5]

[Dean Long]

On Tue, 20 Jan 2026 07:33:39 GMT, Harshit470250 <duke at openjdk.org> wrote:

>> This PR do similar changes done by [JDK-8330851](https://bugs.openjdk.org/browse/JDK-8330851) on the GC TypeFunc creation as suggested by [JDK-8347396](https://bugs.openjdk.org/browse/JDK-8347396). As discussed in [https://github.com/openjdk/jdk/pull/21782#discussion_r1906535686,](https://github.com/openjdk/jdk/pull/21782#discussion_r1906535686) I have put guard on the shenandoah gc specific part of the code.
>
> Harshit470250 has updated the pull request incrementally with one additional commit since the last revision:
> 
>   move include shenandoah to bottom

Testing passed.

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Marked as reviewed by dlong (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27279#pullrequestreview-3696806493