[lworld] RFR: 8352647: [lworld] Remove larval InlineTypeNode in Unsafe intrinsics [v2]

[Jatin Bhateja]

On Wed, 26 Mar 2025 14:14:12 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.
>
> Quan Anh Mai has updated the pull request incrementally with one additional commit since the last revision:
> 
>   comments, set and unset larval bit

Not asking to address in this patch, but what if we return a larval value to caller ? i.e. value returned by makePrivateBuffer is returned from a method since the return type will still be a concrete value type; hence, the caller will expect to receive the arguments in scalarized form. 
https://github.com/openjdk/valhalla/blob/lworld/src/hotspot/share/opto/graphKit.cpp#L2009

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

PR Comment: https://git.openjdk.org/valhalla/pull/1406#issuecomment-2764572206