[Bug tree-optimization/50328] reduction with constant or invariant not vectorized

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50328

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-09-09 09:05:39 UTC ---
Ah, we fail outer loop vectorization because of a bug (versioning for alias
required) and then drop into vectorizable_reduction with a
statement with a operand def that is a PHI with vect_unused_in_scope which of
course does not have its vector type set.  It's also not marked live
for some reason.  Doh, seems to be a genuine swap_tree_operands bug.