> 2023年5月7日 18:34，Maciej W. Rozycki 写道：
>
> On Wed, 3 May 2023, Jiaxun Yang wrote:
>
>> Since it’s possible to run R2- binary on R2+ processor, we’d better find a
>> semantic that do eliminate speculation on all processors. While SSNOPs
>> on R2+ processors is pretty much undefined, there is
> 2023年5月3日 22:04，Maciej W. Rozycki 写道：
>
> On Wed, 3 May 2023, Richard Sandiford wrote:
>
>>> speculation_barrier for MIPS needs sync+jr.hb (r2+),
>>> so we implement __speculation_barrier in libgcc, like arm32 does.
>>
>> Looks reasonable, but do you have a source for the fallback
>> pre-r
> 2023年4月28日 13:33，YunQiang Su 写道：
>
> speculation_barrier for MIPS needs sync+jr.hb (r2+),
> so we implement __speculation_barrier in libgcc, like arm32 does.
>
> gcc/ChangeLog:
> * config/mips/mips-protos.h (mips_emit_speculation_barrier): New
>prototype.
> * config/mips/mips.cc (sp
