[lworld] RFR: 8283573: [lworld] Make Object an abstract class

[Frederic Parain]

On Fri, 25 Mar 2022 13:59:30 GMT, David Simms <dsimms at openjdk.org> wrote:

> The pattern:
> 
> `if (ik == vmClasses::Object_klass() && vmClasses::Object_klass()->is_abstract()) { ik = vmClasses::Identity_klass(); }`
> 
> Keep repeating itself, could this be an inline method somewhere, maybe `valhalla_check_replace_object_identity()` (i.e. self documenting)

A single method would not be possible, because some tests are using Klass* while others are using ciKlass*.

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PR: https://git.openjdk.java.net/valhalla/pull/602