[lworld] RFR: 8352647: [lworld] Remove larval InlineTypeNode in Unsafe intrinsics

[Tobias Hartmann]

On Sun, 23 Mar 2025 17:21:15 GMT, Quan Anh Mai <qamai at openjdk.org> wrote:

> Hi,
> 
> As a step of #1405, I would like to remove the usage of larval value objects in `Unsafe` intrinsics. This patch also tries to make sure that `Unsafe::makePrivateBuffer` and `Unsafe::finishPrivateBuffer` are always inlined, so that larval objects do not cross call boundaries except for invoking object constructors.
> 
> Please take a look and review this PR, thanks a lot.

I just had a look at https://github.com/openjdk/valhalla/pull/1405, thanks for working on this @merykitty. 

> so that larval objects do not cross call boundaries except for invoking object constructors

But this will not prevent users from passing larval objects created via `makePrivateBuffer` to other methods, right? I.e., we still have the issues described in [JDK-8239003](https://bugs.openjdk.org/browse/JDK-8239003) (and linked issues).

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PR Comment: https://git.openjdk.org/valhalla/pull/1406#issuecomment-2753658777