2019-09-19  Richard Biener  <rguenther@suse.de>

	* tree-vect-loop.c (vect_is_slp_reduction): Remove.
	(check_reduction_path): New overload having the path as result.
	(vect_is_simple_reduction): From the detected reduction
	path build a SLP reduction chain if possible.

From-SVN: r275972