RFR: 8351152: x86: Remove code blocks that handle UseSSE < 2 [v2]

Wed Apr 9 16:06:45 UTC 2025

On Wed, 9 Apr 2025 16:03:26 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> 32-bit x86 was the platform that supported `UseSSE < 2`. 64-bit x86 baselines on `UseSSE >= 2`: https://github.com/openjdk/jdk/blob/567c6885a377e5641deef9cd3498f79c5346cd6a/src/hotspot/cpu/x86/vm_version_x86.cpp#L895-L902
>> 
>> After 32-bit x86 code is gone, we can remove all code blocks that are there to support `UseSSE < 2`.
>> 
>> Additional testing:
>>  - [x] Linux x86_64 server fastdebug, `all`
>
> Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Also purge vestigial calls to VMVersion::supports_sse{2}

Looks good.

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Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24484#pullrequestreview-2754003015