RFR: 8317763: Follow-up to AVX512 intrinsics for Arrays.sort() PR [v5]

[Vladimir Ivanov]

On Wed, 11 Oct 2023 20:58:23 GMT, Srinivas Vamsi Parasa <duke at openjdk.org> wrote:

>> The goal of this PR is to address the follow-up comments to the SIMD accelerated sort PR (#14227) which implemented AVX512 intrinsics for Arrays.sort() methods.
>> The proposed changes are:
>> 
>> 1) Restriction of the AVX512 sort acceleration to only Intel CPUs. A performance regression (due to micro-architectural differences) was reported for AMD Zen4 CPUs in the comments section of PR.
>> 2) Addressing the build failure due to a bug in GCC 12 (which was fixed in version 12.3.1). The details of the bug are at: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105593
>> 3) Minor changes in Javadoc strings
>
> Srinivas Vamsi Parasa has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert @ForceInline annotations for small array sort methods

FTR I'm perfectly fine with handling it separately.

> It is not easy to do. You need to make sure that you not enable intrinsic by -XX:ControlIntrinsic=

There's `VM_Version::is_intrinsic_supported()` introduced specifically for such type of platform-specific checks. `vmIntrinsics::is_intrinsic_available()` takes into account both `ControlIntrinsic`/`DisableIntrinsic` and  `VM_Version::is_intrinsic_supported()`.

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PR Comment: https://git.openjdk.org/jdk/pull/16124#issuecomment-1758808390