RFR: 8260473: [vector] ZGC: VectorReshape test produces incorrect results with ZGC enabled [v4]

[王超]

On Thu, 28 Jan 2021 12:45:39 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

> > @iwanowww GraphKit::access_load_at is for parse time only. C2OptAccess must be used here.
> 
> I see. That's unfortunate.
> 
> Actually, `PhaseVector::optimize_vector_boxes()` sets `C->inlining_incrementally() == true` and it enables the code to use `GraphKit` and, moreover, perform late inlining of vector reboxing operations. But I haven't thought through all the implications yet.

`ArrayCopyNode::load` performs the same work as it does here in `PhaseVector::optimize_vector_boxes `.
Is there a need to provide a similar function in PhaseVector or GraphKit?

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PR: https://git.openjdk.java.net/jdk/pull/2253