[autovect] [patch] branch merge

[Daniel Berlin]

On Mon, 2005-04-11 at 10:17 +0300, Ira Rosen wrote:
> 
> 
> 
> Daniel Berlin <dberlin@dberlin.org> wrote on 11/04/2005 01:24:41:
> 
> > It looks like someone has broken the dataref stuff so that it no longer
> > tries to actually resolve the data dependence, even if you tell it to do
> > "detailed analysis" (ie change the incorrect call in tree-loop-linear
> > that passes false as the "detailed_analysis" parameter to
> > compute_data_dependences).
> >
> 
> I am looking into it. There are several issues here.
> 
> The first problem is in function compute_all_dependences. I changed it to
> ignore dependences between the same data-ref, i.e., to avoid creation of
> DDR with same DRA and DRB, and to avoid read-read dependencies. As I
> understand, linear loop transform needs such DDRs. I'll fix this.
> 
> The second problem is that in build_classic_dist_vector incorrect access
> function were analyzed in case of INDIRECT_REF. This problem existed before
> my changes to data refs analysis. 

This is probably my fault, since i added support for INDIRECT_REF to
tree-data-ref.c.

It's probably not checking whether the base is the same before computing
distance or something (or the offsets aren't directly comparable terms).