[jdk18] RFR: 8278267: ARM32: several vector test failures for ASHR

[Ningsheng Jian]

On Tue, 21 Dec 2021 09:53:07 GMT, Dean Long <dlong at openjdk.org> wrote:

> 
> I think there is a simpler fix that doesn't require moving where the negate happens. JDK-8277239 fixed a similar problem by adding a flag on vector shift nodes to indicate variable shift, then checking the flag in the predicate. Perhaps arm32 could do the same?

Hmm, I didn't notice JDK-8277239 before. That looks like a good solution. If it works fine on arm32, we could also do it on aarch64.

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PR: https://git.openjdk.java.net/jdk18/pull/41