RFR: 8322790: RISC-V: Tune costs for shuffles with no conversion [v2]

[Ilya Gavrilin]

On Wed, 3 Jan 2024 05:19:43 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> those nodes need to go below 100 which then starts looking ugly
>
> Seems that the performance gain is still there (tested on lichee-pi-4a board) when reverting part of the changes. I haven't checked the JIT code though. Try this addon change:
> 
> [addon-change.diff.txt](https://github.com/openjdk/jdk/files/13815870/addon-change.diff.txt)

Thanks, reverting some changes still leaves good generation. I have performed some more benchmarks on thead board, in all cases necessary instructions are generated in JIT code.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17206#discussion_r1443795840