RFR: 8369456: [TESTBUG] Fix the test failure of TestSelectFromTwoVectorOp.java on sve2 platforms [v4]

Tue Nov 4 07:12:37 UTC 2025

On Tue, 4 Nov 2025 07:05:42 GMT, erifan <duke at openjdk.org> wrote:

>> According the AD file, partial cases where `vector_length_in_bytes > 8` of the vector API `selectFrom` are not supported on the AArch64 SVE2 platform. But the test `TestSelectFromTwoVectorOp.java` didn't rule out these cases, leading to test faiulres on sve2 plaftforms where `MaxVectorSize > 16`.
>> 
>> This test problem was discovered by simulating a 512-bit sve2 environment using qemu.
>> 
>> This PR fixes these test failures.
>
> erifan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add IR test rules for unsupported partial cases on aarch64

Looks better now :)
I'm running some internal testing before approval.

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PR Comment: https://git.openjdk.org/jdk/pull/27723#issuecomment-3484190865