RFR: 8291809: Convert compiler/c2/cr7200264/TestSSE2IntVect.java to IR verification test [v2]

[Emanuel Peter]

On Thu, 18 Jan 2024 12:34:56 GMT, Daniel Lundén <dlunden at openjdk.org> wrote:

>> test/hotspot/jtreg/compiler/c2/cr7200264/TestIntVect.java line 50:
>> 
>>> 48:     public static void main(String[] args) {
>>> 49:         TestFramework.runWithFlags("-XX:+IgnoreUnrecognizedVMOptions",
>>> 50:                                    "-XX:StressLongCountedLoop=0");
>> 
>> What is this for? Maybe add a comment.
>
> Yes, thanks. The previous comment that fell out is `// make sure int loops do not get converted to long`. I'll readd it.

And is that really necessary?
I don't see the flag in the IR Framework whitelist:
`test/hotspot/jtreg/compiler/lib/ir_framework/TestFramework.java`

That would mean that if you do set the flag, then we would already disable the IR rules, but we could still run the tests, checking for correctness.

TLDR: I believe we should just be able to remove this flag completely.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17428#discussion_r1457384364