[riscv-port-jdk17u:riscv-port] RFR: 8301628: RISC-V: c2 fix pipeline class for several instructions

[Dingli Zhang]

On Tue, 23 May 2023 03:15:52 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Hi, please review this backport to riscv-port-jdk17u.
> Backport of [JDK-8301628](https://bugs.openjdk.org/browse/JDK-8301628).
> The original patch cannot be directly applied because jdk17u has no [JDK-8293695](https://bugs.openjdk.org/browse/JDK-8293695).
> 
> Testing:
> - Tier1-3 passed without new failure on unmacthed (release).

Thanks for the review!

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PR Comment: https://git.openjdk.org/riscv-port-jdk17u/pull/59#issuecomment-1560594856