tree-vectorizer.h (struct _stmt_vec_info): Add reduc_type and reduc_def fields.

2017-05-30  Richard Biener  <rguenther@suse.de>

	* tree-vectorizer.h (struct _stmt_vec_info): Add reduc_type
	and reduc_def fields.
	(STMT_VINFO_REDUC_TYPE): New define.
	(STMT_VINFO_REDUC_DEF): Likewise.
	(vect_force_simple_reduction): Adjust prototype.
	* tree-vect-loop.c (vect_analyze_scalar_cycles_1): Adjust.
	(vect_is_simple_reduction): Remove check_reduction argument.
	(vect_force_simple_reduction): Adjust and set
	STMT_VINFO_REDUC_TYPE and STMT_VINFO_REDUC_DEF.
	(vectorizable_reduction): Do not re-do reduction analysis
	but use STMT_VINFO_REDUC_TYPE and STMT_VINFO_REDUC_DEF.
	* tree-parloops.c (gather_scalar_reductions): Adjust.

From-SVN: r248685