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[Bug middle-end/49969] not vectorized: data ref analysis failed
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 4 Aug 2011 09:45:25 +0000
- Subject: [Bug middle-end/49969] not vectorized: data ref analysis failed
- Auto-submitted: auto-generated
- References: <bug-49969-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49969
Richard Guenther <rguenth at gcc dot gnu.org> 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 <rguenth at gcc dot gnu.org> 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.