RFR: 8349088: De-virtualize Codeblob and nmethod

[Doug Simon]

On Sun, 9 Feb 2025 19:36:28 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> @dougxc and @tkrodriguez, please look if it affects Graal.

I'm pretty sure JVMCI does not care about the virtual-ness of these C++ classes. Running tier9 in mach5 is a good way to be sure.

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PR Comment: https://git.openjdk.org/jdk/pull/23533#issuecomment-2647642674