[Bug middle-end/49969] not vectorized: data ref analysis failed

2012-07-13 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49969

Richard Guenther  changed:

   What|Removed |Added

 Blocks||53947

--- Comment #2 from Richard Guenther  2012-07-13 
08:34:49 UTC ---
Link to vectorizer missed-optimization meta-bug.

[Bug middle-end/49969] not vectorized: data ref analysis failed

2011-08-04 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49969

Richard Guenther  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
   Last reconfirmed||2011.08.04 09:44:45
 CC||spop at gcc dot gnu.org
 Ever Confirmed|0   |1

--- Comment #1 from Richard Guenther  2011-08-04 
09:44:45 UTC ---
Well, that's because the evolution of D.1565_31 is

{{(stride.2_11 + offset.3_21) + 1, +, 1}_1, +, stride.2_11}_2

the loop needs interchange to be vectorized, but that doesn't work either
(no idea for the reason - the .graphite dump isn't very informative here,
well, maybe it runs into the exactly same issue and already gives up?)

Sebastian?

Confirmed anyway.  Supposed to be vectorized with -floop-interchange.