RFR: 8297417: Poly1305IntrinsicFuzzTest fails with tag mismatch exception [v3]

[Kim Barrett]

On Wed, 23 Nov 2022 22:50:34 GMT, Volodymyr Paprotski <duke at openjdk.org> wrote:

>> From https://github.com/openjdk/jdk/pull/10582, `t0` gets clobbered if `rscratch` is used. Example, [here](https://github.com/openjdk/jdk/blob/09f70dad2fe3f0691afacded6c38f61fa8a0d28d/src/hotspot/cpu/x86/stubGenerator_x86_64_poly.cpp#L605-L606): 
>> 
>> 
>>   __ mov(t0, a0);
>>   __ andq(t0, ExternalAddress(poly1305_mask44()), rscratch); // First limb (R^4[43:0])
>
> Volodymyr Paprotski has updated the pull request incrementally with one additional commit since the last revision:
> 
>   add UnlockDiagnosticVMOptions

This is causing some noise in our CI. While I'm not that familiar with the
code being changed, this looks reasonable to me, and has already been approved
by 4 much more competent reviewers. So I'm going to sponsor now to get this in
sooner.

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PR: https://git.openjdk.org/jdk/pull/11308