RFR: 8282162: [vector] Optimize vector negation API [v2]

[Xiaohong Gong]

On Mon, 28 Mar 2022 07:43:29 GMT, Jie Fu <jiefu at openjdk.org> wrote:

>> Xiaohong Gong has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add a superclass for vector negation
>
> src/hotspot/share/opto/vectornode.cpp line 1592:
> 
>> 1590: 
>> 1591: // Generate other vector nodes to implement the masked/non-masked vector negation.
>> 1592: Node* VectorNode::degenerate_vector_integral_negate(Node* n, int vlen, BasicType bt, PhaseGVN* phase, bool is_predicated) {
> 
> Shall we move this declaration in `class  NegVNode` since it is only used by  NegVNode::Ideal ?

I think it can be. Thanks for pointing out this. I will change this later.

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PR: https://git.openjdk.java.net/jdk/pull/7782