RFR: 8365262: [IR-Framework] Add simple way to add cross-product of flags [v6]

[Manuel Hässig]

On Fri, 22 Aug 2025 14:05:20 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Manuel Hässig has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Improvements prompted by Emanuel
>
> test/hotspot/jtreg/compiler/lib/ir_framework/TestFramework.java line 387:
> 
>> 385:                         })
>> 386:                     ),
>> 387:                 (a, b) -> Stream.concat(a, b));
> 
> Wow, that's dense. Maybe a little comment could help here.

It ended up being a lottle comment, but I think it does the job.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26762#discussion_r2294342803