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Re: [PATCH 1/2][Modulo-sched] Fix the direction of the scheduling window

Ayal Zaks/Haifa/IBM wrote on 21/11/2007 17:37:20:

> Revital1 Eres/Haifa/IBM wrote on 20/11/2007 15:47:59:
> > Hello,
> >
> > When determining the scheduling window of a node all types of edges are
> > taken into account.  Currently when a node has both predecessors and
> > successors it will be set close to it's predecessors. In fact it can
> > be that a node has only one successor with true dep edge but it will be
> > scheduled close to it's allegedly predecessor; because of the anti-dep
> > edge between the two nodes.  Trying to avoid this confusion and reduce
> > life range of registers we choose to set the scheduled node close to
> > predecessors or close to it's successors based on true deps edges only.
> >
> > This change makes SMS succeed on the attached testcase with
> > on SPU.  The testcase was provided by Vladimir.
> >
> > Bootstrapped and tested together with the follow on patch (2/2) on ppc,
> > SPU and x86 with no new regressions.
> >
> > :ADDPATCH modulo-sched:
> >
> > OK for mainline?
> Yes, with minor comments below.

Thanks, I'll wait for the approval of patch 2/2 before committing the
fixed version; as patch 2/2 fixes a bug exposed when testing this patch.


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