RFR: JDK-8287061: Support for rematerializing scalar replaced objects participating in allocation merges [v10]

[Vladimir Ivanov]

On Tue, 25 Apr 2023 21:37:11 GMT, Cesar Soares Lucas <cslucas at openjdk.org> wrote:

> ObjectValue is not just a candidate. I.e., the ObjectValue is also used independently of the merge.

And now I'm wondering how it all plays with `is_only_merge_candidate()()`/`set_merge_candidate()`... 

Is it possible for an `ObjectValue` to be shared between multiple merges?

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PR Review Comment: https://git.openjdk.org/jdk/pull/12897#discussion_r1178207147