RFR: 8202579: Revisit VM_Version and VM_Version_ext for overlap and consolidation [v2]

[Coleen Phillimore]

On Tue, 14 Dec 2021 17:42:00 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> This change makes VM_Version_Ext part of VM_Version (the platform dependent part) and moves some duplicated code.  x86 had the most code in VM_Version_Ext, so the most code moved there. There might be some unneeded functions but I didn't want to remove them with this change.
>> 
>> Tier1 (tier2-4 testing in progress) on linux and windows for x86, aarch64, Oracle platforms and tested builds on:
>> linux-aarch64-debug,linux-x86-open,linux-s390x-open,linux-arm32-debug,linux-ppc64le-debug
>> and
>> linux-x64-zero,linux-x64-zero-debug,linux-x86-zero,linux-x86-zero-debug
>> 
>> Ran JFR tests manually (it uses os_perf* CPUInformationInterface code).
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added an initialization assert.

Thanks for the re-review, David.

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PR: https://git.openjdk.java.net/jdk/pull/6820