[Bug middle-end/33966] Revision 129625 caused 11% slowdown on 200.sixtrack

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2007-11-01 11:40 -------
Current partitioning has several problems:

 1) Accounting only accounts for memory references through pointers.

 2) Accounting for the number of VOPs a statement will generate and accounting
    for how many accesses a memory symbol will experience are mixed (thus not
    allowing to weight these factors differently easily)

 3) The goal the pscore function tries to set at is not clear (partly due to
    reason 2).

I have some ideas/patches on this side, but it's late in stage3 and we'll
get (performance) disruption by the PR33870 fix on the partitioning side
as well.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dnovillo at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33966