2019-12-02  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/92742
	* tree-vect-loop.c (vect_fixup_reduc_chain): Do not
	touch the def-type but verify it is consistent with the
	original stmts.

	* gcc.dg/torture/pr92742.c: New testcase.

From-SVN: r278896