RFR: 8286847: Rotate vectors don't support byte or short [v3]

[Xiaohong Gong]

On Mon, 23 May 2022 08:58:19 GMT, Xiaohong Gong <xgong at openjdk.org> wrote:

>> -      CFLAGS_WARNINGS_ARE_ERRORS="-Werror"
>> +      CFLAGS_WARNINGS_ARE_ERRORS=""
>> ...
>> -  JAVA_WARNINGS_ARE_ERRORS ?= -Werror
>> +  JAVA_WARNINGS_ARE_ERRORS ?= 
>> ...
>> 
>> with the dirty diff, I have tested Byte128Vector.
>> Yes, the Score about rotate is lower than before my patch.
>> Could you give me some suggestions?
>
> Since `"VectorNode::implemented"` is only used for auto-vect, I think we can do the check in `"VectorNode::is_vector_rotate_supported" `and return false for byte and short type.

Or you can try to add the right support for byte/short for some cases like https://github.com/openjdk/jdk/pull/7979

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PR: https://git.openjdk.java.net/jdk/pull/8740