RFR: 8343685: C2 SuperWord: refactor VPointer with MemPointer [v14]

[Emanuel Peter]

On Fri, 17 Jan 2025 14:31:10 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

>> Emanuel Peter has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Batch 2 for Christian
>
> test/hotspot/jtreg/compiler/loopopts/superword/TestMemorySegment.java line 649:
> 
>> 647:     @Test
>> 648:     // FAILS: invariants are sorted differently, because of differently inserted Cast.
>> 649:     // See: JDK-8330274
> 
> 8330274 is closed as dup of this one. Should the comment be updated? Same below.

I changed 8330274 -> https://bugs.openjdk.org/browse/JDK-8331659 in all the superword tests.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21926#discussion_r1920984352