RFR: 8352675: Support Intel AVX10 converged vector ISA feature detection [v10]

[Vladimir Ivanov]

On Sat, 3 May 2025 07:55:10 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

> Bitmap size depends on the maximum feature enum value, I made it dynamic to keep it flexible. Do you want the feature vector size to be made constant and manually bump it when we exhaust the limit?

Yes, please. (The limit may be precise - number of  elements in Feature_Flag enum - but the logic which computes the size of backing array can automatically round it and bump the size once the actual limit is reached.) 

> pre_initialize was put in place because codeCache_init() proceeds VM_Version_init() 

I wanted to say that the sole purpose of `pre_initialize` is to allocate memory. Once it goes away, there's no reason to keep it.

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PR Comment: https://git.openjdk.org/jdk/pull/24329#issuecomment-2848507499