[Bug tree-optimization/58010] [4.8/4.9 Regression] ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4378

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58010

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
In the loop in question we have a dead scalar cycle for which we do not
insert loop-closed PHI nodes.  Hm.

The correct fix looks easy though - simply remove the assert.  We'll vectorize
dead code, but who cares.

Testing that.