[Bug tree-optimization/68030] Redundant address calculations in vectorized loop

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68030

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-10-20
                 CC|                            |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Induction variable optimization is responsible here but it needs some help from
a CSE.  I proposed adding a late FRE for that some time ago.  The issue is that
the vectorizer creates some redundancies when creating address IVs for the
vectorized accesses.