[riscv-port-jdk17u:riscv-port] RFR: 8295270: RISC-V: Clean up and refactoring for assembler functions [v2]

[Xiaolin Zheng]

On Mon, 10 Apr 2023 07:00:49 GMT, Gui Cao <gcao at openjdk.org> wrote:

>> Please review this backport to riscv-port-jdk17u.
>> Backport of [JDK-8295270](https://bugs.openjdk.org/browse/JDK-8295270).
>> [JDK-8295270](https://bugs.openjdk.org/browse/JDK-8295270) not clean，origin patch has no eden_allocate, which removed with [JDK-8290706](https://bugs.openjdk.org/browse/JDK-8290706)
>> 
>> Testing:
>> 
>> Tier1-3 passed without new failure on unmacthed (release).
>
> Gui Cao has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add the missing IncompressibleRegion

Thanks for these incremental changes! LGTM from a cursory look.

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Marked as reviewed by xlinzheng (Author).

PR Review: https://git.openjdk.org/riscv-port-jdk17u/pull/38#pullrequestreview-1377164966