gcc/
	* doc/tm.texi.in (TARGET_VECTORIZE_BUILTIN_SCATTER): New.
	* doc/tm.texi: Regenerate.
	* target.def: Add scatter builtin.
	* tree-vectorizer.h: Rename gather_p to gather_scatter_p and use it
	for loads/stores in case of gather/scatter accordingly.
	(STMT_VINFO_GATHER_SCATTER_P(S)): Use it instead of STMT_VINFO_GATHER_P(S).
	(vect_check_gather): Rename to ...
	(vect_check_gather_scatter): this.
	* tree-vect-data-refs.c (vect_analyze_data_ref_dependence): Use
	STMT_VINFO_GATHER_SCATTER_P instead of STMT_VINFO_SCATTER_P.
	(vect_check_gather_scatter): Use it instead of vect_check_gather.
	(vect_analyze_data_refs): Add gatherscatter enum and maybe_scatter variable
	and new checkings for it accordingly.
	* tree-vect-stmts.c
	(STMT_VINFO_GATHER_SCATTER_P(S)): Use it instead of STMT_VINFO_GATHER_P(S).
	(vect_check_gather_scatter): Use it instead of vect_check_gather.
	(vectorizable_store): Add checkings for STMT_VINFO_GATHER_SCATTER_P.

Co-Authored-By: Kirill Yukhin <kirill.yukhin@intel.com>
Co-Authored-By: Petr Murzin <petr.murzin@intel.com>

From-SVN: r227481