RFR: 8299327: Allow super late barrier expansion of store barriers in C2

[Vladimir Kozlov]

On Fri, 23 Dec 2022 14:29:53 GMT, Erik Österlund <eosterlund at openjdk.org> wrote:

> ZGC uses super late barrier expansion for load barriers in C2. Generational ZGC needs to do the same thing but for store barriers.

Seems fine.

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Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.org/jdk/pull/11779