RFR: 8268231: Aarch64: Use ldp in intrinsics for String.compareTo

[Nick Gasson]

On Fri, 30 Jul 2021 10:36:01 GMT, Andrew Haley <aph at redhat.com> wrote:

> 
> I was (still am) tempted to approve it, but Nick says there are still bugs in corner cases.
> 

I meant the earlier String.compareTo that this is partially replacing. This one might be fine but I just wanted to check it had be thoroughly tested. For reference they were:

https://bugs.openjdk.java.net/browse/JDK-8215100
https://bugs.openjdk.java.net/browse/JDK-8237524
https://bugs.openjdk.java.net/browse/JDK-8218966

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PR: https://git.openjdk.java.net/jdk/pull/4722