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From xiaoming...@gmail.com
Subject Re: Re: [jira] Updated: (HARMONY-5965) [drlvm][jit]generate Mnemonic_LEA LIR for Op_Shladd HIR in IA32
Date Fri, 19 Sep 2008 15:39:59 GMT
On Sep 19, 2008 11:27pm, Ian Rogers <rogers.email@gmail.com> wrote:
> xiaoming.gu@gmail.com wrote:
>
>
> Ian, a quick question - is there any instruction scheduling work in Jikes  
RVM? If yes, local or global or both? Thanks. -Xiaoming
>
>
>
>
>
>
> There is instruction scheduling [1] but it is only performed on  
PowerPC[2]. There was an effort to improve it, possibly including x87, but  
that hasn't produced any code I've seen.
>
>
>
> Regards,
>
> Ian
>
>
>
> [1]  
http://jikesrvm.svn.sourceforge.net/viewvc/jikesrvm/rvmroot/trunk/rvm/src/org/jikesrvm/compilers/opt/instrsched/
>
> [2]  
http://jikesrvm.svn.sourceforge.net/viewvc/jikesrvm/rvmroot/trunk/rvm/src/org/jikesrvm/compilers/opt/driver/ppc/MIROptimizationPlanner.java?revision=14000&view=markup#l_87
>

Thanks. To my best knowledge, there is no instruction scheduling in Harmony  
now. I think it's better to do something related with low overhead even in  
out-of-order machines such as IA32.

Xiaoming

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