RFR: 8266904: Use function pointer typedefs in OopOopIterateDispatch

[Stefan Karlsson]

On Wed, 12 May 2021 11:33:15 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> The way our OopIterateClosures are devirtualized is quite complex. I think we can lower the complexity a tiny bit by using a function pointer typedef.
>
> Lgtm.

Thanks for reviewing @tschatzl and @iklam!

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PR: https://git.openjdk.java.net/jdk/pull/3986