RFR: 8291809: Convert compiler/c2/cr7200264/TestSSE2IntVect.java to IR verification test [v3]

[Emanuel Peter]

On Thu, 18 Jan 2024 12:37:25 GMT, Daniel Lundén <dlunden at openjdk.org> wrote:

>> This changeset translates the tests in `compiler/c2/cr7200264/` to use the IR verification framework.
>> 
>> The proposed translation, to the extent possible, attempts to preserve the semantics of the original test. A major difference is that the IR checks are now local (for every `test_*` method) instead of global. The execution time of the new test is comparable to the old test.
>> 
>> Testing:
>> - [GitHub Actions](https://github.com/dlunde/jdk/actions/runs/7553846710)
>> - Ran the new translated tests within all tier1 through tier10 contexts on windows-x64, linux-x64, linux-aarch64, macosx-x64, and macosx-aarch64.
>> - Tested that manually adding `-XX:LoopUnrollLimit=0` to the test framework flags caused the translated tests to fail. Note: it is, however, no longer possible to break the test by passing `-XX:LoopUnrollLimit=0` on the command line.
>
> Daniel Lundén has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Apply suggestions from code review
>   
>   Co-authored-by: Emanuel Peter <emanuel.peter at oracle.com>

@dlunde you are right, those examples don't contain any `LShiftVI`. See the comment below.

-------------

Changes requested by epeter (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17428#pullrequestreview-1836893808