[Bug tree-optimization/31756] Doesn't optimize the following (obvious) sequence

[dberlin at gcc dot gnu dot org]

------- Comment #1 from dberlin at gcc dot gnu dot org  2007-04-29 16:05 -------
PRE optimized the "offset" and "stride" variables.
SCEV doesn't know how to create an offset or step out of these optimized
operations.  We used to at some point, but I believe these are "peeled_chrec's"
that we removed support for before merge.

I think it's time we add back support for these chrec's.  I can't block PRE
from optimizing these variables easily.  


-- 

dberlin at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dberlin at gcc dot gnu dot
                   |                            |org, spop at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-04-29 16:05:59
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31756