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Re: Re: Any SMS loop example?
- From: "zhongknocken" <zhongknocken at tom dot com>
- To: "mostafa hagog" <mustafa at il dot ibm dot com>
- Cc: gcc at gcc dot gnu dot org
- Date: Tue, 29 Mar 2005 11:29:54 +0800 (CST)
- Subject: Re: Re: Any SMS loop example?
I've tried the dot-product loop and some other loops on Itanium machine. The machine description of the target processor has DFA defined for it. The function "sms_schedule" is invoked, but no loop is SMS scheduled.
> This is highly dependent on the target processor for which you are trying
> to schedule the loops. For example, If the machine description of the
> target processor doesn't have DFA defined for it SMS is not performed at
> all. One good example of a loop that would be scheduled in SMS (on a G5
> machine for example) is the dot-product loop.
>
> gcc-owner@gcc.gnu.org wrote on 28/03/2005 15:37:08:
>
> > I want to get the compiling result of SMS(Swing Modulo Scheduling), and
> I've
> > compiled many programs using the flag "-O3 -fmodulo-sched", but no loop
> is
> > SMS scheduled.
> > I'm now using gcc 4.0.0 20041212.
> > Can any one give me a program or a section of program which has loops
> that can
> > be SMS scheduled? Thanks.
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