2015-11-06  Richard Biener  <rguenther@suse.de>

	* tree-vectorizer.h (struct _bb_vec_info): Add region_begin/end
	members.
	(vect_stmt_in_region_p): Declare.
	* tree-vect-slp.c (new_bb_vec_info): Work on a region.
	(destroy_bb_vec_info): Likewise.
	(vect_bb_slp_scalar_cost): Use vect_stmt_in_region_p.
	(vect_get_and_check_slp_defs): Likewise.
	(vect_slp_analyze_bb_1): Refactor to make it work on sub-BBs.
	(vect_slp_bb): Likewise.
	* tree-vect-patterns.c (vect_same_loop_or_bb_p): Implement
	in terms of vect_stmt_in_region_p.
	(vect_pattern_recog): Iterate over the BB region.
	* tree-vect-stmts.c (vect_is_simple_use): Use vect_stmt_in_region_p.
	* tree-vectorizer.c (vect_stmt_in_region_p): New function.
	(pass_slp_vectorize::execute): Initialize all stmt UIDs to -1.

	* config/i386/i386.c: Include gimple-iterator.h.
	* config/aarch64/aarch64.c: Likewise.

	* gcc.dg/vect/bb-slp-38.c: New testcase.

From-SVN: r229842