On Tue, 24 Mar 2026 15:30:13 GMT, Stefan Karlsson <[email protected]> wrote:

> In preparation for JEP-401 I propose that we remove the unused larval bit 
> from the markWord. The last API to use it was removed with 
> [JDK-8373375](https://bugs.openjdk.org/browse/JDK-8373375).
> 
> I received feedback that we should still keep the mark word bit reserved for 
> Project Valhalla, so that's reflected in the change.
> 
> There is still a lot of JIT compiler support for larval bits, but I've 
> limited this PR to only clean up the markWord usages.
> 
> It would be good to get some feedback about what to do with the callnode.cpp 
> change.
> 
> Tested locally with `test TEST=hotspot_valhalla`.

This pull request has now been integrated.

Changeset: ee487738
Author:    Stefan Karlsson <[email protected]>
URL:       
https://git.openjdk.org/valhalla/commit/ee48773888ced8e22149ea519028611001563030
Stats:     58 lines in 7 files changed: 5 ins; 41 del; 12 mod

8380802: [lworld] Remove larval bit from markWord

Reviewed-by: fparain

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

PR: https://git.openjdk.org/valhalla/pull/2258

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