RFR: 8262916: Merge LShiftCntV and RShiftCntV into a single node

[Eric Liu]

On Thu, 8 Apr 2021 05:14:52 GMT, Dean Long <dlong at openjdk.org> wrote:

> You should be able to do this without introducing a new node type. 

Do you mean just matching them with ReplicateBNode? Indeed they do generate the same instruction. I was wondering about the same but I'm not sure if ReplicateBNode has the same semantic with ShiftCntV in middle-end.

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PR: https://git.openjdk.java.net/jdk/pull/3371