[39/46,v2] Change STMT_VINFO_UNALIGNED_DR to a dr_vec_info

[Updated after new 37/46 and 38/46]

After previous changes, it makes more sense for STMT_VINFO_UNALIGNED_DR
to be dr_vec_info rather than a data_reference.


2018-07-26  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-vectorizer.h (_loop_vec_info::unaligned_dr): Change to
	dr_vec_info.
	* tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Update
	accordingly.
	* tree-vect-loop.c (vect_analyze_loop_2): Likewise.
	* tree-vect-loop-manip.c (get_misalign_in_elems): Likewise.
	(vect_gen_prolog_loop_niters): Likewise.

On Thu, Jul 26, 2018 at 1:08 PM Richard Sandiford
<richard.sandiford@arm.com> wrote:
>
> [Updated after new 37/46 and 38/46]
>
> After previous changes, it makes more sense for STMT_VINFO_UNALIGNED_DR
> to be dr_vec_info rather than a data_reference.

OK.

>
> 2018-07-26  Richard Sandiford  <richard.sandiford@arm.com>
>
> gcc/
>         * tree-vectorizer.h (_loop_vec_info::unaligned_dr): Change to
>         dr_vec_info.
>         * tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Update
>         accordingly.
>         * tree-vect-loop.c (vect_analyze_loop_2): Likewise.
>         * tree-vect-loop-manip.c (get_misalign_in_elems): Likewise.
>         (vect_gen_prolog_loop_niters): Likewise.
>
> Index: gcc/tree-vectorizer.h
> ===================================================================
> --- gcc/tree-vectorizer.h       2018-07-26 11:42:19.035663718 +0100
> +++ gcc/tree-vectorizer.h       2018-07-26 11:42:24.919598492 +0100
> @@ -437,7 +437,7 @@ typedef struct _loop_vec_info : public v
>    tree mask_compare_type;
>
>    /* Unknown DRs according to which loop was peeled.  */
> -  struct data_reference *unaligned_dr;
> +  struct dr_vec_info *unaligned_dr;
>
>    /* peeling_for_alignment indicates whether peeling for alignment will take
>       place, and what the peeling factor should be:
> Index: gcc/tree-vect-data-refs.c
> ===================================================================
> --- gcc/tree-vect-data-refs.c   2018-07-26 11:42:19.031663762 +0100
> +++ gcc/tree-vect-data-refs.c   2018-07-26 11:42:24.915598537 +0100
> @@ -2135,7 +2135,7 @@ vect_enhance_data_refs_alignment (loop_v
>                 vect_update_misalignment_for_peel (dr_info, dr0_info, npeel);
>               }
>
> -          LOOP_VINFO_UNALIGNED_DR (loop_vinfo) = dr0_info->dr;
> +          LOOP_VINFO_UNALIGNED_DR (loop_vinfo) = dr0_info;
>            if (npeel)
>              LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo) = npeel;
>            else
> Index: gcc/tree-vect-loop.c
> ===================================================================
> --- gcc/tree-vect-loop.c        2018-07-26 11:42:19.031663762 +0100
> +++ gcc/tree-vect-loop.c        2018-07-26 11:42:24.919598492 +0100
> @@ -2142,8 +2142,7 @@ vect_analyze_loop_2 (loop_vec_info loop_
>           /* Niters for peeled prolog loop.  */
>           if (LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo) < 0)
>             {
> -             dr_vec_info *dr_info
> -               = DR_VECT_AUX (LOOP_VINFO_UNALIGNED_DR (loop_vinfo));
> +             dr_vec_info *dr_info = LOOP_VINFO_UNALIGNED_DR (loop_vinfo);
>               tree vectype = STMT_VINFO_VECTYPE (dr_info->stmt);
>               niters_th += TYPE_VECTOR_SUBPARTS (vectype) - 1;
>             }
> Index: gcc/tree-vect-loop-manip.c
> ===================================================================
> --- gcc/tree-vect-loop-manip.c  2018-07-26 11:42:19.031663762 +0100
> +++ gcc/tree-vect-loop-manip.c  2018-07-26 11:42:24.915598537 +0100
> @@ -1560,7 +1560,7 @@ vect_update_ivs_after_vectorizer (loop_v
>  static tree
>  get_misalign_in_elems (gimple **seq, loop_vec_info loop_vinfo)
>  {
> -  dr_vec_info *dr_info = DR_VECT_AUX (LOOP_VINFO_UNALIGNED_DR (loop_vinfo));
> +  dr_vec_info *dr_info = LOOP_VINFO_UNALIGNED_DR (loop_vinfo);
>    stmt_vec_info stmt_info = dr_info->stmt;
>    tree vectype = STMT_VINFO_VECTYPE (stmt_info);
>
> @@ -1627,7 +1627,7 @@ get_misalign_in_elems (gimple **seq, loo
>  vect_gen_prolog_loop_niters (loop_vec_info loop_vinfo,
>                              basic_block bb, int *bound)
>  {
> -  dr_vec_info *dr_info = DR_VECT_AUX (LOOP_VINFO_UNALIGNED_DR (loop_vinfo));
> +  dr_vec_info *dr_info = LOOP_VINFO_UNALIGNED_DR (loop_vinfo);
>    tree var;
>    tree niters_type = TREE_TYPE (LOOP_VINFO_NITERS (loop_vinfo));
>    gimple_seq stmts = NULL, new_stmts = NULL;