RFR: 8298470: Short cut java.lang.Object super class loading

[David Holmes]

On Fri, 16 Dec 2022 13:41:31 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> While investigating another bug, I found doing this simple optimization saves taking out a SystemDictionary_lock, adding and removing a placeholder and some Symbol refcounting.
> Tested with tier1-4.

Looks simple and clean. Have to wonder why this shortcut hasn't always been there?

Thanks.

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.org/jdk/pull/11711