RFR: 8275262: [BACKOUT] AArch64: Implement string_compare intrinsic in SVE

[Andrew Haley]

On Thu, 14 Oct 2021 10:21:20 GMT, David Holmes <david.holmes at oracle.com> wrote:

> See https://bugs.openjdk.java.net/browse/JDK-8275263 for some info on the failures. It seems really bizarre.

I would understand this a lot better if the affected machines actually used SVE, but they don't have the hardware.
That does reduce the bug surface: we only need to look at the affected common code, and the only thing I can immediately see is that a couple of unused register arguments have been added. 
Unless, of course, the affected Macs think they have SVE... ? I don't think that's possible.
I'd definitely be looking at the host toolchain for differences.

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PR: https://git.openjdk.java.net/jdk/pull/5941