This is another patch in the series to remove the assumption that
all modes involved in vectorisation have to be the same size.
Rather than have the target provide a list of vector sizes,
it makes the target provide a list of vector "approaches",
with each approach represented by a mode.

A later patch will pass this mode to targetm.vectorize.related_mode
to get the vector mode for a given element mode.  Until then, the modes
simply act as an alternative way of specifying the vector size.


2019-10-24  Richard Sandiford  <richard.sandif...@arm.com>

gcc/
        * target.h (vector_sizes, auto_vector_sizes): Delete.
        (vector_modes, auto_vector_modes): New typedefs.
        * target.def (autovectorize_vector_sizes): Replace with...
        (autovectorize_vector_modes): ...this new hook.
        * doc/tm.texi.in (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES):
        Replace with...
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES): ...this new hook.
        * doc/tm.texi: Regenerate.
        * targhooks.h (default_autovectorize_vector_sizes): Delete.
        (default_autovectorize_vector_modes): New function.
        * targhooks.c (default_autovectorize_vector_sizes): Delete.
        (default_autovectorize_vector_modes): New function.
        * omp-general.c (omp_max_vf): Use autovectorize_vector_modes instead
        of autovectorize_vector_sizes.  Use the number of units in the mode
        to calculate the maximum VF.
        * omp-low.c (omp_clause_aligned_alignment): Use
        autovectorize_vector_modes instead of autovectorize_vector_sizes.
        Use a loop based on related_mode to iterate through all supported
        vector modes for a given scalar mode.
        * optabs-query.c (can_vec_mask_load_store_p): Use
        autovectorize_vector_modes instead of autovectorize_vector_sizes.
        * tree-vect-loop.c (vect_analyze_loop, vect_transform_loop): Likewise.
        * tree-vect-slp.c (vect_slp_bb_region): Likewise.
        * config/aarch64/aarch64.c (aarch64_autovectorize_vector_sizes):
        Replace with...
        (aarch64_autovectorize_vector_modes): ...this new function.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES): Delete.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES): Define.
        * config/arc/arc.c (arc_autovectorize_vector_sizes): Replace with...
        (arc_autovectorize_vector_modes): ...this new function.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES): Delete.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES): Define.
        * config/arm/arm.c (arm_autovectorize_vector_sizes): Replace with...
        (arm_autovectorize_vector_modes): ...this new function.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES): Delete.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES): Define.
        * config/i386/i386.c (ix86_autovectorize_vector_sizes): Replace with...
        (ix86_autovectorize_vector_modes): ...this new function.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES): Delete.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES): Define.
        * config/mips/mips.c (mips_autovectorize_vector_sizes): Replace with...
        (mips_autovectorize_vector_modes): ...this new function.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES): Delete.
        (TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES): Define.

Index: gcc/target.h
===================================================================
--- gcc/target.h        2019-09-30 17:19:39.843166118 +0100
+++ gcc/target.h        2019-10-25 13:27:15.525762975 +0100
@@ -205,11 +205,11 @@ enum vect_cost_model_location {
 class vec_perm_indices;
 
 /* The type to use for lists of vector sizes.  */
-typedef vec<poly_uint64> vector_sizes;
+typedef vec<machine_mode> vector_modes;
 
 /* Same, but can be used to construct local lists that are
    automatically freed.  */
-typedef auto_vec<poly_uint64, 8> auto_vector_sizes;
+typedef auto_vec<machine_mode, 8> auto_vector_modes;
 
 /* The target structure.  This holds all the backend hooks.  */
 #define DEFHOOKPOD(NAME, DOC, TYPE, INIT) TYPE NAME;
Index: gcc/target.def
===================================================================
--- gcc/target.def      2019-10-25 13:26:59.309877555 +0100
+++ gcc/target.def      2019-10-25 13:27:15.525762975 +0100
@@ -1894,20 +1894,28 @@ reached.  The default is @var{mode} whic
 /* Returns a mask of vector sizes to iterate over when auto-vectorizing
    after processing the preferred one derived from preferred_simd_mode.  */
 DEFHOOK
-(autovectorize_vector_sizes,
- "If the mode returned by @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE} is not\n\
-the only one that is worth considering, this hook should add all suitable\n\
-vector sizes to @var{sizes}, in order of decreasing preference.  The first\n\
-one should be the size of @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE}.\n\
-If @var{all} is true, add suitable vector sizes even when they are generally\n\
+(autovectorize_vector_modes,
+ "If using the mode returned by @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE}\n\
+is not the only approach worth considering, this hook should add one mode to\n\
+@var{modes} for each useful alternative approach.  These modes are then\n\
+passed to @code{TARGET_VECTORIZE_RELATED_MODE} to obtain the vector mode\n\
+for a given element mode.\n\
+\n\
+The modes returned in @var{modes} should use the smallest element mode\n\
+possible for the vectorization approach that they represent, preferring\n\
+integer modes over floating-poing modes in the event of a tie.  The first\n\
+mode should be the @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE} for its\n\
+element mode.\n\
+\n\
+If @var{all} is true, add suitable vector modes even when they are generally\n\
 not expected to be worthwhile.\n\
 \n\
 The hook does not need to do anything if the vector returned by\n\
 @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE} is the only one relevant\n\
 for autovectorization.  The default implementation does nothing.",
  void,
- (vector_sizes *sizes, bool all),
- default_autovectorize_vector_sizes)
+ (vector_modes *modes, bool all),
+ default_autovectorize_vector_modes)
 
 DEFHOOK
 (related_mode,
Index: gcc/doc/tm.texi.in
===================================================================
--- gcc/doc/tm.texi.in  2019-10-25 13:26:59.009879675 +0100
+++ gcc/doc/tm.texi.in  2019-10-25 13:27:15.521763003 +0100
@@ -4179,7 +4179,7 @@ address;  but often a machine-dependent
 
 @hook TARGET_VECTORIZE_SPLIT_REDUCTION
 
-@hook TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES
+@hook TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES
 
 @hook TARGET_VECTORIZE_RELATED_MODE
 
Index: gcc/doc/tm.texi
===================================================================
--- gcc/doc/tm.texi     2019-10-25 13:26:59.305877583 +0100
+++ gcc/doc/tm.texi     2019-10-25 13:27:15.521763003 +0100
@@ -6016,12 +6016,20 @@ against lower halves of vectors recursiv
 reached.  The default is @var{mode} which means no splitting.
 @end deftypefn
 
-@deftypefn {Target Hook} void TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES 
(vector_sizes *@var{sizes}, bool @var{all})
-If the mode returned by @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE} is not
-the only one that is worth considering, this hook should add all suitable
-vector sizes to @var{sizes}, in order of decreasing preference.  The first
-one should be the size of @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE}.
-If @var{all} is true, add suitable vector sizes even when they are generally
+@deftypefn {Target Hook} void TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES 
(vector_modes *@var{modes}, bool @var{all})
+If using the mode returned by @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE}
+is not the only approach worth considering, this hook should add one mode to
+@var{modes} for each useful alternative approach.  These modes are then
+passed to @code{TARGET_VECTORIZE_RELATED_MODE} to obtain the vector mode
+for a given element mode.
+
+The modes returned in @var{modes} should use the smallest element mode
+possible for the vectorization approach that they represent, preferring
+integer modes over floating-poing modes in the event of a tie.  The first
+mode should be the @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE} for its
+element mode.
+
+If @var{all} is true, add suitable vector modes even when they are generally
 not expected to be worthwhile.
 
 The hook does not need to do anything if the vector returned by
Index: gcc/targhooks.h
===================================================================
--- gcc/targhooks.h     2019-10-25 13:26:59.309877555 +0100
+++ gcc/targhooks.h     2019-10-25 13:27:15.525762975 +0100
@@ -113,7 +113,7 @@ default_builtin_support_vector_misalignm
                                             int, bool);
 extern machine_mode default_preferred_simd_mode (scalar_mode mode);
 extern machine_mode default_split_reduction (machine_mode);
-extern void default_autovectorize_vector_sizes (vector_sizes *, bool);
+extern void default_autovectorize_vector_modes (vector_modes *, bool);
 extern opt_machine_mode default_vectorize_related_mode (machine_mode,
                                                        scalar_mode,
                                                        poly_uint64);
Index: gcc/targhooks.c
===================================================================
--- gcc/targhooks.c     2019-10-25 13:26:59.309877555 +0100
+++ gcc/targhooks.c     2019-10-25 13:27:15.525762975 +0100
@@ -1299,11 +1299,10 @@ default_split_reduction (machine_mode mo
   return mode;
 }
 
-/* By default only the size derived from the preferred vector mode
-   is tried.  */
+/* By default only the preferred vector mode is tried.  */
 
 void
-default_autovectorize_vector_sizes (vector_sizes *, bool)
+default_autovectorize_vector_modes (vector_modes *, bool)
 {
 }
 
Index: gcc/omp-general.c
===================================================================
--- gcc/omp-general.c   2019-10-25 09:21:28.798326303 +0100
+++ gcc/omp-general.c   2019-10-25 13:27:15.521763003 +0100
@@ -508,13 +508,16 @@ omp_max_vf (void)
          && global_options_set.x_flag_tree_loop_vectorize))
     return 1;
 
-  auto_vector_sizes sizes;
-  targetm.vectorize.autovectorize_vector_sizes (&sizes, true);
-  if (!sizes.is_empty ())
+  auto_vector_modes modes;
+  targetm.vectorize.autovectorize_vector_modes (&modes, true);
+  if (!modes.is_empty ())
     {
       poly_uint64 vf = 0;
-      for (unsigned int i = 0; i < sizes.length (); ++i)
-       vf = ordered_max (vf, sizes[i]);
+      for (unsigned int i = 0; i < modes.length (); ++i)
+       /* The returned modes use the smallest element size (and thus
+          the largest nunits) for the vectorization approach that they
+          represent.  */
+       vf = ordered_max (vf, GET_MODE_NUNITS (modes[i]));
       return vf;
     }
 
Index: gcc/omp-low.c
===================================================================
--- gcc/omp-low.c       2019-10-11 15:43:51.283513446 +0100
+++ gcc/omp-low.c       2019-10-25 13:27:15.525762975 +0100
@@ -3947,11 +3947,8 @@ omp_clause_aligned_alignment (tree claus
   /* Otherwise return implementation defined alignment.  */
   unsigned int al = 1;
   opt_scalar_mode mode_iter;
-  auto_vector_sizes sizes;
-  targetm.vectorize.autovectorize_vector_sizes (&sizes, true);
-  poly_uint64 vs = 0;
-  for (unsigned int i = 0; i < sizes.length (); ++i)
-    vs = ordered_max (vs, sizes[i]);
+  auto_vector_modes modes;
+  targetm.vectorize.autovectorize_vector_modes (&modes, true);
   static enum mode_class classes[]
     = { MODE_INT, MODE_VECTOR_INT, MODE_FLOAT, MODE_VECTOR_FLOAT };
   for (int i = 0; i < 4; i += 2)
@@ -3962,19 +3959,18 @@ omp_clause_aligned_alignment (tree claus
        machine_mode vmode = targetm.vectorize.preferred_simd_mode (mode);
        if (GET_MODE_CLASS (vmode) != classes[i + 1])
          continue;
-       while (maybe_ne (vs, 0U)
-              && known_lt (GET_MODE_SIZE (vmode), vs)
-              && GET_MODE_2XWIDER_MODE (vmode).exists ())
-         vmode = GET_MODE_2XWIDER_MODE (vmode).require ();
+       machine_mode alt_vmode;
+       for (unsigned int j = 0; j < modes.length (); ++j)
+         if (related_vector_mode (modes[j], mode).exists (&alt_vmode)
+             && known_ge (GET_MODE_SIZE (alt_vmode), GET_MODE_SIZE (vmode)))
+           vmode = alt_vmode;
 
        tree type = lang_hooks.types.type_for_mode (mode, 1);
        if (type == NULL_TREE || TYPE_MODE (type) != mode)
          continue;
-       poly_uint64 nelts = exact_div (GET_MODE_SIZE (vmode),
-                                      GET_MODE_SIZE (mode));
-       type = build_vector_type (type, nelts);
-       if (TYPE_MODE (type) != vmode)
-         continue;
+       type = build_vector_type_for_mode (type, vmode);
+       /* The functions above are not allowed to return invalid modes.  */
+       gcc_assert (TYPE_MODE (type) == vmode);
        if (TYPE_ALIGN_UNIT (type) > al)
          al = TYPE_ALIGN_UNIT (type);
       }
Index: gcc/optabs-query.c
===================================================================
--- gcc/optabs-query.c  2019-10-25 13:26:59.305877583 +0100
+++ gcc/optabs-query.c  2019-10-25 13:27:15.525762975 +0100
@@ -589,11 +589,11 @@ can_vec_mask_load_store_p (machine_mode
       && convert_optab_handler (op, vmode, mask_mode) != CODE_FOR_nothing)
     return true;
 
-  auto_vector_sizes vector_sizes;
-  targetm.vectorize.autovectorize_vector_sizes (&vector_sizes, true);
-  for (unsigned int i = 0; i < vector_sizes.length (); ++i)
+  auto_vector_modes vector_modes;
+  targetm.vectorize.autovectorize_vector_modes (&vector_modes, true);
+  for (unsigned int i = 0; i < vector_modes.length (); ++i)
     {
-      poly_uint64 cur = vector_sizes[i];
+      poly_uint64 cur = GET_MODE_SIZE (vector_modes[i]);
       poly_uint64 nunits;
       if (!multiple_p (cur, GET_MODE_SIZE (smode), &nunits))
        continue;
Index: gcc/tree-vect-loop.c
===================================================================
--- gcc/tree-vect-loop.c        2019-10-25 13:26:59.137878771 +0100
+++ gcc/tree-vect-loop.c        2019-10-25 13:27:15.525762975 +0100
@@ -2319,12 +2319,12 @@ vect_analyze_loop_2 (loop_vec_info loop_
 vect_analyze_loop (class loop *loop, loop_vec_info orig_loop_vinfo,
                   vec_info_shared *shared)
 {
-  auto_vector_sizes vector_sizes;
+  auto_vector_modes vector_modes;
 
   /* Autodetect first vector size we try.  */
-  targetm.vectorize.autovectorize_vector_sizes (&vector_sizes,
+  targetm.vectorize.autovectorize_vector_modes (&vector_modes,
                                                loop->simdlen != 0);
-  unsigned int next_size = 0;
+  unsigned int mode_i = 0;
 
   DUMP_VECT_SCOPE ("analyze_loop_nest");
 
@@ -2343,7 +2343,7 @@ vect_analyze_loop (class loop *loop, loo
   unsigned n_stmts = 0;
   poly_uint64 autodetected_vector_size = 0;
   opt_loop_vec_info first_loop_vinfo = opt_loop_vec_info::success (NULL);
-  poly_uint64 next_vector_size = 0;
+  machine_mode next_vector_mode = VOIDmode;
   while (1)
     {
       /* Check the CFG characteristics of the loop (nesting, entry/exit).  */
@@ -2357,7 +2357,7 @@ vect_analyze_loop (class loop *loop, loo
          gcc_checking_assert (first_loop_vinfo == NULL);
          return loop_vinfo;
        }
-      loop_vinfo->vector_size = next_vector_size;
+      loop_vinfo->vector_size = GET_MODE_SIZE (next_vector_mode);
 
       bool fatal = false;
 
@@ -2365,7 +2365,7 @@ vect_analyze_loop (class loop *loop, loo
        LOOP_VINFO_ORIG_LOOP_INFO (loop_vinfo) = orig_loop_vinfo;
 
       opt_result res = vect_analyze_loop_2 (loop_vinfo, fatal, &n_stmts);
-      if (next_size == 0)
+      if (mode_i == 0)
        autodetected_vector_size = loop_vinfo->vector_size;
 
       if (res)
@@ -2399,11 +2399,12 @@ vect_analyze_loop (class loop *loop, loo
          return opt_loop_vec_info::propagate_failure (res);
        }
 
-      if (next_size < vector_sizes.length ()
-         && known_eq (vector_sizes[next_size], autodetected_vector_size))
-       next_size += 1;
+      if (mode_i < vector_modes.length ()
+         && known_eq (GET_MODE_SIZE (vector_modes[mode_i]),
+                      autodetected_vector_size))
+       mode_i += 1;
 
-      if (next_size == vector_sizes.length ()
+      if (mode_i == vector_modes.length ()
          || known_eq (autodetected_vector_size, 0U))
        {
          if (first_loop_vinfo)
@@ -2423,15 +2424,11 @@ vect_analyze_loop (class loop *loop, loo
        }
 
       /* Try the next biggest vector size.  */
-      next_vector_size = vector_sizes[next_size++];
+      next_vector_mode = vector_modes[mode_i++];
       if (dump_enabled_p ())
-       {
-         dump_printf_loc (MSG_NOTE, vect_location,
-                          "***** Re-trying analysis with "
-                          "vector size ");
-         dump_dec (MSG_NOTE, next_vector_size);
-         dump_printf (MSG_NOTE, "\n");
-       }
+       dump_printf_loc (MSG_NOTE, vect_location,
+                        "***** Re-trying analysis with vector mode %s\n",
+                        GET_MODE_NAME (next_vector_mode));
     }
 }
 
@@ -8277,9 +8274,9 @@ vect_transform_loop (loop_vec_info loop_
 
   if (epilogue)
     {
-      auto_vector_sizes vector_sizes;
-      targetm.vectorize.autovectorize_vector_sizes (&vector_sizes, false);
-      unsigned int next_size = 0;
+      auto_vector_modes vector_modes;
+      targetm.vectorize.autovectorize_vector_modes (&vector_modes, false);
+      unsigned int next_i = 0;
 
       /* Note LOOP_VINFO_NITERS_KNOWN_P and LOOP_VINFO_INT_NITERS work
          on niters already ajusted for the iterations of the prologue.  */
@@ -8295,18 +8292,20 @@ vect_transform_loop (loop_vec_info loop_
          epilogue->any_upper_bound = true;
 
          unsigned int ratio;
-         while (next_size < vector_sizes.length ()
-                && !(constant_multiple_p (loop_vinfo->vector_size,
-                                          vector_sizes[next_size], &ratio)
+         while (next_i < vector_modes.length ()
+                && !(constant_multiple_p
+                     (loop_vinfo->vector_size,
+                      GET_MODE_SIZE (vector_modes[next_i]), &ratio)
                      && eiters >= lowest_vf / ratio))
-           next_size += 1;
+           next_i += 1;
        }
       else
-       while (next_size < vector_sizes.length ()
-              && maybe_lt (loop_vinfo->vector_size, vector_sizes[next_size]))
-         next_size += 1;
+       while (next_i < vector_modes.length ()
+              && maybe_lt (loop_vinfo->vector_size,
+                           GET_MODE_SIZE (vector_modes[next_i])))
+         next_i += 1;
 
-      if (next_size == vector_sizes.length ())
+      if (next_i == vector_modes.length ())
        epilogue = NULL;
     }
 
Index: gcc/tree-vect-slp.c
===================================================================
--- gcc/tree-vect-slp.c 2019-10-25 13:26:59.141878743 +0100
+++ gcc/tree-vect-slp.c 2019-10-25 13:27:15.525762975 +0100
@@ -3087,12 +3087,12 @@ vect_slp_bb_region (gimple_stmt_iterator
                    unsigned int n_stmts)
 {
   bb_vec_info bb_vinfo;
-  auto_vector_sizes vector_sizes;
+  auto_vector_modes vector_modes;
 
   /* Autodetect first vector size we try.  */
-  poly_uint64 next_vector_size = 0;
-  targetm.vectorize.autovectorize_vector_sizes (&vector_sizes, false);
-  unsigned int next_size = 0;
+  machine_mode next_vector_mode = VOIDmode;
+  targetm.vectorize.autovectorize_vector_modes (&vector_modes, false);
+  unsigned int mode_i = 0;
 
   vec_info_shared shared;
 
@@ -3109,7 +3109,7 @@ vect_slp_bb_region (gimple_stmt_iterator
        bb_vinfo->shared->save_datarefs ();
       else
        bb_vinfo->shared->check_datarefs ();
-      bb_vinfo->vector_size = next_vector_size;
+      bb_vinfo->vector_size = GET_MODE_SIZE (next_vector_mode);
 
       if (vect_slp_analyze_bb_1 (bb_vinfo, n_stmts, fatal)
          && dbg_cnt (vect_slp))
@@ -3136,17 +3136,18 @@ vect_slp_bb_region (gimple_stmt_iterator
          vectorized = true;
        }
 
-      if (next_size == 0)
+      if (mode_i == 0)
        autodetected_vector_size = bb_vinfo->vector_size;
 
       delete bb_vinfo;
 
-      if (next_size < vector_sizes.length ()
-         && known_eq (vector_sizes[next_size], autodetected_vector_size))
-       next_size += 1;
+      if (mode_i < vector_modes.length ()
+         && known_eq (GET_MODE_SIZE (vector_modes[mode_i]),
+                      autodetected_vector_size))
+       mode_i += 1;
 
       if (vectorized
-         || next_size == vector_sizes.length ()
+         || mode_i == vector_modes.length ()
          || known_eq (autodetected_vector_size, 0U)
          /* If vect_slp_analyze_bb_1 signaled that analysis for all
             vector sizes will fail do not bother iterating.  */
@@ -3154,15 +3155,11 @@ vect_slp_bb_region (gimple_stmt_iterator
        return vectorized;
 
       /* Try the next biggest vector size.  */
-      next_vector_size = vector_sizes[next_size++];
+      next_vector_mode = vector_modes[mode_i++];
       if (dump_enabled_p ())
-       {
-         dump_printf_loc (MSG_NOTE, vect_location,
-                          "***** Re-trying analysis with "
-                          "vector size ");
-         dump_dec (MSG_NOTE, next_vector_size);
-         dump_printf (MSG_NOTE, "\n");
-       }
+       dump_printf_loc (MSG_NOTE, vect_location,
+                        "***** Re-trying analysis with vector mode %s\n",
+                        GET_MODE_NAME (next_vector_mode));
     }
 }
 
Index: gcc/config/aarch64/aarch64.c
===================================================================
--- gcc/config/aarch64/aarch64.c        2019-10-25 13:26:59.177878488 +0100
+++ gcc/config/aarch64/aarch64.c        2019-10-25 13:27:15.505763118 +0100
@@ -15203,12 +15203,12 @@ aarch64_preferred_simd_mode (scalar_mode
 /* Return a list of possible vector sizes for the vectorizer
    to iterate over.  */
 static void
-aarch64_autovectorize_vector_sizes (vector_sizes *sizes, bool)
+aarch64_autovectorize_vector_modes (vector_modes *modes, bool)
 {
   if (TARGET_SVE)
-    sizes->safe_push (BYTES_PER_SVE_VECTOR);
-  sizes->safe_push (16);
-  sizes->safe_push (8);
+    modes->safe_push (VNx16QImode);
+  modes->safe_push (V16QImode);
+  modes->safe_push (V8QImode);
 }
 
 /* Implement TARGET_MANGLE_TYPE.  */
@@ -20915,9 +20915,9 @@ #define TARGET_VECTORIZE_BUILTINS
 #define TARGET_VECTORIZE_BUILTIN_VECTORIZED_FUNCTION \
   aarch64_builtin_vectorized_function
 
-#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES
-#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES \
-  aarch64_autovectorize_vector_sizes
+#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES
+#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES \
+  aarch64_autovectorize_vector_modes
 
 #undef TARGET_ATOMIC_ASSIGN_EXPAND_FENV
 #define TARGET_ATOMIC_ASSIGN_EXPAND_FENV \
Index: gcc/config/arc/arc.c
===================================================================
--- gcc/config/arc/arc.c        2019-10-25 09:21:25.974346475 +0100
+++ gcc/config/arc/arc.c        2019-10-25 13:27:15.505763118 +0100
@@ -607,15 +607,15 @@ arc_preferred_simd_mode (scalar_mode mod
 }
 
 /* Implements target hook
-   TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES.  */
+   TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES.  */
 
 static void
-arc_autovectorize_vector_sizes (vector_sizes *sizes, bool)
+arc_autovectorize_vector_modes (vector_modes *modes, bool)
 {
   if (TARGET_PLUS_QMACW)
     {
-      sizes->quick_push (8);
-      sizes->quick_push (4);
+      modes->quick_push (V4HImode);
+      modes->quick_push (V2HImode);
     }
 }
 
@@ -726,8 +726,8 @@ #define TARGET_VECTOR_MODE_SUPPORTED_P a
 #undef TARGET_VECTORIZE_PREFERRED_SIMD_MODE
 #define TARGET_VECTORIZE_PREFERRED_SIMD_MODE arc_preferred_simd_mode
 
-#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES
-#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES 
arc_autovectorize_vector_sizes
+#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES
+#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES 
arc_autovectorize_vector_modes
 
 #undef TARGET_CAN_USE_DOLOOP_P
 #define TARGET_CAN_USE_DOLOOP_P arc_can_use_doloop_p
Index: gcc/config/arm/arm.c
===================================================================
--- gcc/config/arm/arm.c        2019-10-23 11:29:47.933883742 +0100
+++ gcc/config/arm/arm.c        2019-10-25 13:27:15.513763059 +0100
@@ -289,7 +289,7 @@ static bool arm_builtin_support_vector_m
 static void arm_conditional_register_usage (void);
 static enum flt_eval_method arm_excess_precision (enum excess_precision_type);
 static reg_class_t arm_preferred_rename_class (reg_class_t rclass);
-static void arm_autovectorize_vector_sizes (vector_sizes *, bool);
+static void arm_autovectorize_vector_modes (vector_modes *, bool);
 static int arm_default_branch_cost (bool, bool);
 static int arm_cortex_a5_branch_cost (bool, bool);
 static int arm_cortex_m_branch_cost (bool, bool);
@@ -522,9 +522,9 @@ #define TARGET_VECTOR_MODE_SUPPORTED_P a
 #define TARGET_ARRAY_MODE_SUPPORTED_P arm_array_mode_supported_p
 #undef TARGET_VECTORIZE_PREFERRED_SIMD_MODE
 #define TARGET_VECTORIZE_PREFERRED_SIMD_MODE arm_preferred_simd_mode
-#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES
-#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES \
-  arm_autovectorize_vector_sizes
+#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES
+#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES \
+  arm_autovectorize_vector_modes
 
 #undef  TARGET_MACHINE_DEPENDENT_REORG
 #define TARGET_MACHINE_DEPENDENT_REORG arm_reorg
@@ -29012,12 +29012,12 @@ arm_vector_alignment (const_tree type)
 }
 
 static void
-arm_autovectorize_vector_sizes (vector_sizes *sizes, bool)
+arm_autovectorize_vector_modes (vector_modes *modes, bool)
 {
   if (!TARGET_NEON_VECTORIZE_DOUBLE)
     {
-      sizes->safe_push (16);
-      sizes->safe_push (8);
+      modes->safe_push (V16QImode);
+      modes->safe_push (V8QImode);
     }
 }
 
Index: gcc/config/i386/i386.c
===================================================================
--- gcc/config/i386/i386.c      2019-10-25 13:26:59.277877782 +0100
+++ gcc/config/i386/i386.c      2019-10-25 13:27:15.517763031 +0100
@@ -21387,35 +21387,35 @@ ix86_preferred_simd_mode (scalar_mode mo
    256bit and 128bit vectors.  */
 
 static void
-ix86_autovectorize_vector_sizes (vector_sizes *sizes, bool all)
+ix86_autovectorize_vector_modes (vector_modes *modes, bool all)
 {
   if (TARGET_AVX512F && !TARGET_PREFER_AVX256)
     {
-      sizes->safe_push (64);
-      sizes->safe_push (32);
-      sizes->safe_push (16);
+      modes->safe_push (V64QImode);
+      modes->safe_push (V32QImode);
+      modes->safe_push (V16QImode);
     }
   else if (TARGET_AVX512F && all)
     {
-      sizes->safe_push (32);
-      sizes->safe_push (16);
-      sizes->safe_push (64);
+      modes->safe_push (V32QImode);
+      modes->safe_push (V16QImode);
+      modes->safe_push (V64QImode);
     }
   else if (TARGET_AVX && !TARGET_PREFER_AVX128)
     {
-      sizes->safe_push (32);
-      sizes->safe_push (16);
+      modes->safe_push (V32QImode);
+      modes->safe_push (V16QImode);
     }
   else if (TARGET_AVX && all)
     {
-      sizes->safe_push (16);
-      sizes->safe_push (32);
+      modes->safe_push (V16QImode);
+      modes->safe_push (V32QImode);
     }
   else if (TARGET_MMX_WITH_SSE)
-    sizes->safe_push (16);
+    modes->safe_push (V16QImode);
 
   if (TARGET_MMX_WITH_SSE)
-    sizes->safe_push (8);
+    modes->safe_push (V8QImode);
 }
 
 /* Implemenation of targetm.vectorize.get_mask_mode.  */
@@ -22954,9 +22954,9 @@ #define TARGET_VECTORIZE_PREFERRED_SIMD_
 #undef TARGET_VECTORIZE_SPLIT_REDUCTION
 #define TARGET_VECTORIZE_SPLIT_REDUCTION \
   ix86_split_reduction
-#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES
-#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES \
-  ix86_autovectorize_vector_sizes
+#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES
+#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES \
+  ix86_autovectorize_vector_modes
 #undef TARGET_VECTORIZE_GET_MASK_MODE
 #define TARGET_VECTORIZE_GET_MASK_MODE ix86_get_mask_mode
 #undef TARGET_VECTORIZE_INIT_COST
Index: gcc/config/mips/mips.c
===================================================================
--- gcc/config/mips/mips.c      2019-10-17 14:22:54.903313423 +0100
+++ gcc/config/mips/mips.c      2019-10-25 13:27:15.517763031 +0100
@@ -13453,13 +13453,13 @@ mips_preferred_simd_mode (scalar_mode mo
   return word_mode;
 }
 
-/* Implement TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES.  */
+/* Implement TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES.  */
 
 static void
-mips_autovectorize_vector_sizes (vector_sizes *sizes, bool)
+mips_autovectorize_vector_modes (vector_modes *modes, bool)
 {
   if (ISA_HAS_MSA)
-    sizes->safe_push (16);
+    modes->safe_push (V16QImode);
 }
 
 /* Implement TARGET_INIT_LIBFUNCS.  */
@@ -22694,9 +22694,9 @@ #define TARGET_SCALAR_MODE_SUPPORTED_P m
 
 #undef TARGET_VECTORIZE_PREFERRED_SIMD_MODE
 #define TARGET_VECTORIZE_PREFERRED_SIMD_MODE mips_preferred_simd_mode
-#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES
-#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES \
-  mips_autovectorize_vector_sizes
+#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES
+#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES \
+  mips_autovectorize_vector_modes
 
 #undef TARGET_INIT_BUILTINS
 #define TARGET_INIT_BUILTINS mips_init_builtins

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