RFR: 8348887: Create IR framework test for JDK-8347997

[Marc Chevalier]

On Mon, 31 Mar 2025 13:41:17 GMT, Marc Chevalier <mchevalier at openjdk.org> wrote:

> As the ticket says:
>> Create IR framework test which checks that allocations are eliminated in the regression test included in [JDK-8347997](https://bugs.openjdk.org/browse/JDK-8347997) fix.
> 
> So here it is! We can see that in case of inlining, indeed, no allocation happens. The second part is some sanity check to emphasize the difference: of course, there is an allocation without inlining. The benefit of this second part is arguable. From my point of view, it's mostly to point out the difference to a future reader. But yes, there is nothing very surprising.
> 
> Thanks,
> Marc

Made quite some changes, but in particular: got rid of catches, and renamed cases. New names are not that much more inspired, but at least, not confusing.

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PR Comment: https://git.openjdk.org/jdk/pull/24328#issuecomment-2772064669