RFR: 8370666: VectorAPI: Add clear comments for vector relative code in c2 [v3]

[Xiaohong Gong]

On Fri, 16 Jan 2026 08:53:13 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Xiaohong Gong has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update comments in type.cpp
>
> src/hotspot/share/opto/vectornode.hpp line 57:
> 
>> 55: // operations. While BVectMask primarily represents mask values loaded from or
>> 56: // stored to Java boolean memory, and is currently used in certain mask operations
>> 57: // (i.e. VectorMaskOpNode).
> 
> You can also specify here that BVectMask representation is specifically tied to mask backing storage and VectorLoadMask and VectorStoreMask IR is needed to transform it to/from P/NVectMask

Thanks for looking at this PR. I added the mask type comment  at the IR definition code in `vectornode.hpp` for these two IRs. Is that fine to you? Or we'd better comment here as well.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29130#discussion_r2697609026