[Bug tree-optimization/32921] [4.3 Regression] Revision 126326 causes 12% slowdown

[rguenth at gcc dot gnu dot org]

------- Comment #34 from rguenth at gcc dot gnu dot org  2007-10-24 15:19 -------
Created an attachment (id=14406)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14406&action=view)
partition heuristics change

The idea is to change the statistics to make the values in the fields
match their names and based on that avoid partitioning for variables
that are often directly accessed or indirectly accessed as mostly
reads or writes.  It probably makes sense to change the field names
and weight the individual accesses with their BB frequency again.

Of course the patch is not finished and is untested apart from throwing
it on the 2nd testcase.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32921