RFR: 8289943: Simplify some object allocation merges [v11]

[Cesar Soares Lucas]

On Wed, 5 Oct 2022 22:52:21 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Yes, experimental flag is good for now if you DO plan to switch it ON later (and convert flag into other type).

Yes, our plan is to keep working on this until we can remove all the constraints in `can_reduce_this_phi`. We have already discussed ideas of how to remove those constraints and we'll be tackling that (and discussing it with you & the community) after we get this initial implementation upstreamed.

> The trouble with false experimental flags is that code become dead and "rot" if nobody care about it.

Totally understand your concern. I'm fine with setting the flag to true and making it "Diagnostic" - I just don't see it as a "Diagnostic" patch, but if it's fine for you then it's fine for me.

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

PR: https://git.openjdk.org/jdk/pull/9073