RFR: 8375443: AVX-512: Disabling through UseSHA doesn't affect UseSHA3Intrinsics [v3]

[Ramkumar Sunderbabu]

On Tue, 20 Jan 2026 17:59:48 GMT, Manuel Hässig <mhaessig at openjdk.org> wrote:

>> Ramkumar Sunderbabu has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   whitespace issue fixed
>
> test/hotspot/jtreg/compiler/arguments/TestUseSHA3IntrinsicsWithUseSHADisabled.java line 32:
> 
>> 30:  * @requires vm.flagless
>> 31:  * @requires os.arch == "amd64" | os.arch == "x86_64"
>> 32:  * @requires vm.cpu.features ~= ".*avx512f.*" & vm.cpu.features ~= ".*avx512bw.*"
> 
> It would be great to also test that the warning is emitted when `-XX:+UseSHA3Intrinsics` is passed, but is not supported by the CPU. You could remove this line and detect the features using `WHITE_BOX.getCPUFeatures()`.

the properties are set already using WhiteBox.getCPUFeatures()
https://github.com/openjdk/jdk/blob/983ae96f60c935aa52f482d21ae6a0d947679541/test/lib/jdk/test/whitebox/cpuinfo/CPUInfo.java#L53C39-L53C53

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PR Review Comment: https://git.openjdk.org/jdk/pull/29266#discussion_r2712373828