RFR: 8296515: RISC-V: Small refactoring for MaxReductionV/MinReductionV/AddReductionV node implementation [v2]

[Gui Cao]

On Tue, 8 Nov 2022 11:41:22 GMT, Gui Cao <gcao at openjdk.org> wrote:

>> HI,
>> 
>> The MaxReductionV, MinReductionV, AddReductionV nodes currently implemented by riscv rvv can be implemented by calling shared functions, and the T_BYTE and T_SHORT types in the MaxReductionV and MinReductionV node implementations can also be implemented in the same way as the T_INT type.
>> 
>> Please take a look and have some reviews. Thanks a lot.
>> 
>> ## Testing:
>> - hotspot and jdk tier1 on unmatched board without new failures
>> - test/jdk/jdk/incubator/vector/* with fastdebug on qemu
>
> Gui Cao has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Use the same predicate as reduce_addI
>  - Remove the REDUCTION_OP enumeration type and use Opcode to represent the operation

Thanks for review. And all of  `test/jdk/jdk/incubator/vector/*` test case passed.

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PR: https://git.openjdk.org/jdk/pull/11036