RFR: 8323497: On x64, use 32-bit immediate moves for narrow klass base if possible [v5]

[Aleksey Shipilev]

On Thu, 22 May 2025 12:59:50 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> Yes, please review. I will be running tests before pushing but otherwise I think this is fine as it is.

OK, I'll get to it. Meanwhile, I see you have put `Fix Version: 26` on the bug. I think we should strive for 25 at this point.

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PR Comment: https://git.openjdk.org/jdk/pull/17340#issuecomment-2901176788