RFR: 8332533: RISC-V: Enable vector variable shift instructions for machines with RVV

[Gui Cao]

On Tue, 21 May 2024 13:50:55 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Is `UseRVV ` a const? Seems you need to remove `constexpr`. Or you can just return true (so, keep constexpr), as `supports_vector_variable_shifts` is not a independent check, and it's protected by `Matcher::match_rule_supported_vector` in both vector api and auto-vectorization.

Thanks for your review. I've removed `constexpr`.

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PR Comment: https://git.openjdk.org/jdk/pull/19313#issuecomment-2122771148