RFR: 8288477: nmethod header size reduction

[Dean Long]

On Fri, 8 Jul 2022 13:20:22 GMT, Boris Ulasevich <bulasevich at openjdk.org> wrote:

> > Most of the files changed are because of CompLevel. It feels a little disruptive. I'd rather do the minimal changes.
> 
> Do you mind using the CompilerType? Since we have this type defined, I think it should be used. Does it make sense to propose this int->CompilerType cleanup as a separate change prior to this one?

I was going to suggest doing it as a separate change after this one.

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PR: https://git.openjdk.org/jdk/pull/9165