GNU gcc commit:

a82fc9c... 	PR tree-optimization/56350 	* tree-vect-loop.c (vectorizable_reduction): If orig_stmt, return false 	if haven't found reduction or nested cycle operand, rather than 	asserting we must find it.
HEAD is now at c526d40... 	Backported from mainline 	2013-02-19  Jakub Jelinek  <jakub@redhat.com>