* tree-vectorizer.c (get_vec_alignment_for_decl): New static function.
(get_vec_alignment_for_array_decl): Likewise.
(get_vec_alignment_for_record_decl): Likewise.
(increase_alignment::execute): Move code to find alignment to
get_vec_alignment_for_array_decl and call get_vec_alignment_for_decl.
(type_align_map): New hash_map.