add vec_info * parameters where needed

add vec_info * parameters where needed

Soonish we'll get SLP nodes which have no corresponding scalar
stmt and thus not stmt_vec_info and thus no way to get back to
the associated vec_info.  This patch makes the vec_info available
as part of the APIs instead of putting in that back-pointer into
the leaf data structures.

2020-05-05  Richard Biener  <rguenther@suse.de>

	* tree-vectorizer.h (_stmt_vec_info::vinfo): Remove.
	(STMT_VINFO_LOOP_VINFO): Likewise.
	(STMT_VINFO_BB_VINFO): Likewise.
	* tree-vect-data-refs.c: Adjust for the above, adding vec_info *
	parameters and adjusting calls.
	* tree-vect-loop-manip.c: Likewise.
	* tree-vect-loop.c: Likewise.
	* tree-vect-patterns.c: Likewise.
	* tree-vect-slp.c: Likewise.
	* tree-vect-stmts.c: Likewise.
	* tree-vectorizer.c: Likewise.

	* target.def (add_stmt_cost): Add vec_info * parameter.
	* target.h (stmt_in_inner_loop_p): Likewise.
	* targhooks.c (default_add_stmt_cost): Adjust.
	* doc/tm.texi: Re-generate.

	* config/aarch64/aarch64.c (aarch64_extending_load_p): Add
	vec_info * parameter and adjust.
	(aarch64_sve_adjust_stmt_cost): Likewise.
	(aarch64_add_stmt_cost): Likewise.
	* config/arm/arm.c (arm_add_stmt_cost): Likewise.
	* config/i386/i386.c (ix86_add_stmt_cost): Likewise.
	* config/rs6000/rs6000.c (rs6000_add_stmt_cost): Likewise.