2015-12-18  Richard Biener  <rguenther@suse.de>

	PR testsuite/68776
	* tree-vect-patterns.c (struct vect_recog_func): New.
	(vect_vect_recog_func_ptrs): Make an array of function name pairs.
	(vect_pattern_recog_1): Print the recognized pattern name.  Return
	true if a pattern was recognized.
	(vect_pattern_recog): Adjust.  Stop iterating over pattern recognition
	functions on a stmt if a pattern was recognized.

	* gcc.dg/vect/vect-widen-mult-const-s16.c: Adjust.
	* gcc.dg/vect/vect-widen-mult-const-u16.c: Likewise.

From-SVN: r231815