RFR: 8352897: RISC-V: Change default value for UseConservativeFence

[Robbin Ehn]

On Tue, 25 Mar 2025 16:20:46 GMT, Ludovic Henry <luhenry at openjdk.org> wrote:

>> Hi, please consider.
>> 
>> gcc have stopped emitting io-bits for fences since 13.
>> And we need to use newer gcc due to other compiler bugs.
>> Therefore there is no point in letting JIT emit io-bits when the runtime don't have them.
>> 
>> Thanks, Robbin
>
> Marked as reviewed by luhenry (Committer).

Thank you @luhenry !

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PR Comment: https://git.openjdk.org/jdk/pull/24233#issuecomment-2751837216