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* trans.h (struct gfc_ss, struct gfc_ss_info): Move member struct
[pf3gnuchains/gcc-fork.git] / gcc / fortran / trans-array.c
index 91359e9..173e52b 100644 (file)
@@ -486,20 +486,30 @@ gfc_free_ss_chain (gfc_ss * ss)
 }
 
 
+static void
+free_ss_info (gfc_ss_info *ss_info)
+{
+  free (ss_info);
+}
+
+
 /* Free a SS.  */
 
 static void
 gfc_free_ss (gfc_ss * ss)
 {
+  gfc_ss_info *ss_info;
   int n;
 
-  switch (ss->type)
+  ss_info = ss->info;
+
+  switch (ss_info->type)
     {
     case GFC_SS_SECTION:
-      for (n = 0; n < ss->data.info.dimen; n++)
+      for (n = 0; n < ss->dimen; n++)
        {
-         if (ss->data.info.subscript[ss->data.info.dim[n]])
-           gfc_free_ss_chain (ss->data.info.subscript[ss->data.info.dim[n]]);
+         if (ss->data.info.subscript[ss->dim[n]])
+           gfc_free_ss_chain (ss->data.info.subscript[ss->dim[n]]);
        }
       break;
 
@@ -507,6 +517,7 @@ gfc_free_ss (gfc_ss * ss)
       break;
     }
 
+  free_ss_info (ss_info);
   free (ss);
 }
 
@@ -517,17 +528,19 @@ gfc_ss *
 gfc_get_array_ss (gfc_ss *next, gfc_expr *expr, int dimen, gfc_ss_type type)
 {
   gfc_ss *ss;
-  gfc_ss_info *info;
+  gfc_ss_info *ss_info;
   int i;
 
+  ss_info = gfc_get_ss_info ();
+  ss_info->type = type;
+  ss_info->expr = expr;
+
   ss = gfc_get_ss ();
+  ss->info = ss_info;
   ss->next = next;
-  ss->type = type;
-  ss->expr = expr;
-  info = &ss->data.info;
-  info->dimen = dimen;
-  for (i = 0; i < info->dimen; i++)
-    info->dim[i] = i;
+  ss->dimen = dimen;
+  for (i = 0; i < ss->dimen; i++)
+    ss->dim[i] = i;
 
   return ss;
 }
@@ -539,13 +552,20 @@ gfc_ss *
 gfc_get_temp_ss (tree type, tree string_length, int dimen)
 {
   gfc_ss *ss;
+  gfc_ss_info *ss_info;
+  int i;
+
+  ss_info = gfc_get_ss_info ();
+  ss_info->type = GFC_SS_TEMP;
+  ss_info->string_length = string_length;
+  ss_info->data.temp.type = type;
 
   ss = gfc_get_ss ();
+  ss->info = ss_info;
   ss->next = gfc_ss_terminator;
-  ss->type = GFC_SS_TEMP;
-  ss->string_length = string_length;
-  ss->data.temp.dimen = dimen;
-  ss->data.temp.type = type;
+  ss->dimen = dimen;
+  for (i = 0; i < ss->dimen; i++)
+    ss->dim[i] = i;
 
   return ss;
 }
@@ -557,11 +577,15 @@ gfc_ss *
 gfc_get_scalar_ss (gfc_ss *next, gfc_expr *expr)
 {
   gfc_ss *ss;
+  gfc_ss_info *ss_info;
+
+  ss_info = gfc_get_ss_info ();
+  ss_info->type = GFC_SS_SCALAR;
+  ss_info->expr = expr;
 
   ss = gfc_get_ss ();
+  ss->info = ss_info;
   ss->next = next;
-  ss->type = GFC_SS_SCALAR;
-  ss->expr = expr;
 
   return ss;
 }
@@ -642,7 +666,7 @@ gfc_set_loop_bounds_from_array_spec (gfc_interface_mapping * mapping,
   if (as && as->type == AS_EXPLICIT)
     for (n = 0; n < se->loop->dimen; n++)
       {
-       dim = se->ss->data.info.dim[n];
+       dim = se->ss->dim[n];
        gcc_assert (dim < as->rank);
        gcc_assert (se->loop->dimen == as->rank);
        if (se->loop->to[n] == NULL_TREE)
@@ -685,7 +709,7 @@ gfc_set_loop_bounds_from_array_spec (gfc_interface_mapping * mapping,
 
 static void
 gfc_trans_allocate_array_storage (stmtblock_t * pre, stmtblock_t * post,
-                                 gfc_ss_info * info, tree size, tree nelem,
+                                 gfc_array_info * info, tree size, tree nelem,
                                  tree initial, bool dynamic, bool dealloc)
 {
   tree tmp;
@@ -807,15 +831,15 @@ gfc_trans_allocate_array_storage (stmtblock_t * pre, stmtblock_t * post,
    */
 
 static int
-get_array_ref_dim (gfc_ss_info *info, int loop_dim)
+get_array_ref_dim (gfc_ss *ss, int loop_dim)
 {
   int n, array_dim, array_ref_dim;
 
   array_ref_dim = 0;
-  array_dim = info->dim[loop_dim];
+  array_dim = ss->dim[loop_dim];
 
-  for (n = 0; n < info->dimen; n++)
-    if (n != loop_dim && info->dim[n] < array_dim)
+  for (n = 0; n < ss->dimen; n++)
+    if (ss->dim[n] < array_dim)
       array_ref_dim++;
 
   return array_ref_dim;
@@ -838,10 +862,11 @@ get_array_ref_dim (gfc_ss_info *info, int loop_dim)
 
 tree
 gfc_trans_create_temp_array (stmtblock_t * pre, stmtblock_t * post,
-                            gfc_loopinfo * loop, gfc_ss_info * info,
+                            gfc_loopinfo * loop, gfc_ss * ss,
                             tree eltype, tree initial, bool dynamic,
                             bool dealloc, bool callee_alloc, locus * where)
 {
+  gfc_array_info *info;
   tree from[GFC_MAX_DIMENSIONS], to[GFC_MAX_DIMENSIONS];
   tree type;
   tree desc;
@@ -855,8 +880,10 @@ gfc_trans_create_temp_array (stmtblock_t * pre, stmtblock_t * post,
   memset (from, 0, sizeof (from));
   memset (to, 0, sizeof (to));
 
-  gcc_assert (info->dimen > 0);
-  gcc_assert (loop->dimen == info->dimen);
+  info = &ss->data.info;
+
+  gcc_assert (ss->dimen > 0);
+  gcc_assert (loop->dimen == ss->dimen);
 
   if (gfc_option.warn_array_temp && where)
     gfc_warning ("Creating array temporary at %L", where);
@@ -864,7 +891,7 @@ gfc_trans_create_temp_array (stmtblock_t * pre, stmtblock_t * post,
   /* Set the lower bound to zero.  */
   for (n = 0; n < loop->dimen; n++)
     {
-      dim = info->dim[n];
+      dim = ss->dim[n];
 
       /* Callee allocated arrays may not have a known bound yet.  */
       if (loop->to[n])
@@ -881,7 +908,7 @@ gfc_trans_create_temp_array (stmtblock_t * pre, stmtblock_t * post,
         to the n'th dimension of the array. We need to reconstruct loop infos
         in the right order before using it to set the descriptor
         bounds.  */
-      tmp_dim = get_array_ref_dim (info, n);
+      tmp_dim = get_array_ref_dim (ss, n);
       from[tmp_dim] = loop->from[n];
       to[tmp_dim] = loop->to[n];
 
@@ -893,7 +920,7 @@ gfc_trans_create_temp_array (stmtblock_t * pre, stmtblock_t * post,
 
   /* Initialize the descriptor.  */
   type =
-    gfc_get_array_type_bounds (eltype, info->dimen, 0, from, to, 1,
+    gfc_get_array_type_bounds (eltype, ss->dimen, 0, from, to, 1,
                               GFC_ARRAY_UNKNOWN, true);
   desc = gfc_create_var (type, "atmp");
   GFC_DECL_PACKED_ARRAY (desc) = 1;
@@ -931,7 +958,7 @@ gfc_trans_create_temp_array (stmtblock_t * pre, stmtblock_t * post,
 
   for (n = 0; n < loop->dimen; n++)
     {
-      dim = info->dim[n];
+      dim = ss->dim[n];
 
       if (size == NULL_TREE)
        {
@@ -997,8 +1024,8 @@ gfc_trans_create_temp_array (stmtblock_t * pre, stmtblock_t * post,
   gfc_trans_allocate_array_storage (pre, post, info, size, nelem, initial,
                                    dynamic, dealloc);
 
-  if (info->dimen > loop->temp_dim)
-    loop->temp_dim = info->dimen;
+  if (ss->dimen > loop->temp_dim)
+    loop->temp_dim = ss->dimen;
 
   return size;
 }
@@ -1849,14 +1876,13 @@ gfc_build_constant_array_constructor (gfc_expr * expr, tree type)
    gfc_build_constant_array_constructor.  */
 
 static void
-gfc_trans_constant_array_constructor (gfc_loopinfo * loop,
-                                     gfc_ss * ss, tree type)
+trans_constant_array_constructor (gfc_ss * ss, tree type)
 {
-  gfc_ss_info *info;
+  gfc_array_info *info;
   tree tmp;
   int i;
 
-  tmp = gfc_build_constant_array_constructor (ss->expr, type);
+  tmp = gfc_build_constant_array_constructor (ss->info->expr, type);
 
   info = &ss->data.info;
 
@@ -1864,21 +1890,18 @@ gfc_trans_constant_array_constructor (gfc_loopinfo * loop,
   info->data = gfc_build_addr_expr (NULL_TREE, tmp);
   info->offset = gfc_index_zero_node;
 
-  for (i = 0; i < info->dimen; i++)
+  for (i = 0; i < ss->dimen; i++)
     {
       info->delta[i] = gfc_index_zero_node;
       info->start[i] = gfc_index_zero_node;
       info->end[i] = gfc_index_zero_node;
       info->stride[i] = gfc_index_one_node;
     }
-
-  if (info->dimen > loop->temp_dim)
-    loop->temp_dim = info->dimen;
 }
 
 /* Helper routine of gfc_trans_array_constructor to determine if the
    bounds of the loop specified by LOOP are constant and simple enough
-   to use with gfc_trans_constant_array_constructor.  Returns the
+   to use with trans_constant_array_constructor.  Returns the
    iteration count of the loop if suitable, and NULL_TREE otherwise.  */
 
 static tree
@@ -1930,75 +1953,80 @@ gfc_trans_array_constructor (gfc_loopinfo * loop, gfc_ss * ss, locus * where)
   bool dynamic;
   bool old_first_len, old_typespec_chararray_ctor;
   tree old_first_len_val;
+  gfc_ss_info *ss_info;
+  gfc_expr *expr;
 
   /* Save the old values for nested checking.  */
   old_first_len = first_len;
   old_first_len_val = first_len_val;
   old_typespec_chararray_ctor = typespec_chararray_ctor;
 
+  ss_info = ss->info;
+  expr = ss_info->expr;
+
   /* Do bounds-checking here and in gfc_trans_array_ctor_element only if no
      typespec was given for the array constructor.  */
-  typespec_chararray_ctor = (ss->expr->ts.u.cl
-                            && ss->expr->ts.u.cl->length_from_typespec);
+  typespec_chararray_ctor = (expr->ts.u.cl
+                            && expr->ts.u.cl->length_from_typespec);
 
   if ((gfc_option.rtcheck & GFC_RTCHECK_BOUNDS)
-      && ss->expr->ts.type == BT_CHARACTER && !typespec_chararray_ctor)
+      && expr->ts.type == BT_CHARACTER && !typespec_chararray_ctor)
     {  
       first_len_val = gfc_create_var (gfc_charlen_type_node, "len");
       first_len = true;
     }
 
-  gcc_assert (ss->data.info.dimen == loop->dimen);
+  gcc_assert (ss->dimen == loop->dimen);
 
-  c = ss->expr->value.constructor;
-  if (ss->expr->ts.type == BT_CHARACTER)
+  c = expr->value.constructor;
+  if (expr->ts.type == BT_CHARACTER)
     {
       bool const_string;
       
       /* get_array_ctor_strlen walks the elements of the constructor, if a
         typespec was given, we already know the string length and want the one
         specified there.  */
-      if (typespec_chararray_ctor && ss->expr->ts.u.cl->length
-         && ss->expr->ts.u.cl->length->expr_type != EXPR_CONSTANT)
+      if (typespec_chararray_ctor && expr->ts.u.cl->length
+         && expr->ts.u.cl->length->expr_type != EXPR_CONSTANT)
        {
          gfc_se length_se;
 
          const_string = false;
          gfc_init_se (&length_se, NULL);
-         gfc_conv_expr_type (&length_se, ss->expr->ts.u.cl->length,
+         gfc_conv_expr_type (&length_se, expr->ts.u.cl->length,
                              gfc_charlen_type_node);
-         ss->string_length = length_se.expr;
+         ss_info->string_length = length_se.expr;
          gfc_add_block_to_block (&loop->pre, &length_se.pre);
          gfc_add_block_to_block (&loop->post, &length_se.post);
        }
       else
        const_string = get_array_ctor_strlen (&loop->pre, c,
-                                             &ss->string_length);
+                                             &ss_info->string_length);
 
       /* Complex character array constructors should have been taken care of
         and not end up here.  */
-      gcc_assert (ss->string_length);
+      gcc_assert (ss_info->string_length);
 
-      ss->expr->ts.u.cl->backend_decl = ss->string_length;
+      expr->ts.u.cl->backend_decl = ss_info->string_length;
 
-      type = gfc_get_character_type_len (ss->expr->ts.kind, ss->string_length);
+      type = gfc_get_character_type_len (expr->ts.kind, ss_info->string_length);
       if (const_string)
        type = build_pointer_type (type);
     }
   else
-    type = gfc_typenode_for_spec (&ss->expr->ts);
+    type = gfc_typenode_for_spec (&expr->ts);
 
   /* See if the constructor determines the loop bounds.  */
   dynamic = false;
 
-  if (ss->expr->shape && loop->dimen > 1 && loop->to[0] == NULL_TREE)
+  if (expr->shape && loop->dimen > 1 && loop->to[0] == NULL_TREE)
     {
       /* We have a multidimensional parameter.  */
       int n;
-      for (n = 0; n < ss->expr->rank; n++)
+      for (n = 0; n < expr->rank; n++)
       {
        loop->from[n] = gfc_index_zero_node;
-       loop->to[n] = gfc_conv_mpz_to_tree (ss->expr->shape [n],
+       loop->to[n] = gfc_conv_mpz_to_tree (expr->shape [n],
                                            gfc_index_integer_kind);
        loop->to[n] = fold_build2_loc (input_location, MINUS_EXPR,
                                       gfc_array_index_type,
@@ -2033,7 +2061,7 @@ gfc_trans_array_constructor (gfc_loopinfo * loop, gfc_ss * ss, locus * where)
          tree size = constant_array_constructor_loop_size (loop);
          if (size && compare_tree_int (size, nelem) == 0)
            {
-             gfc_trans_constant_array_constructor (loop, ss, type);
+             trans_constant_array_constructor (ss, type);
              goto finish;
            }
        }
@@ -2042,7 +2070,7 @@ gfc_trans_array_constructor (gfc_loopinfo * loop, gfc_ss * ss, locus * where)
   if (TREE_CODE (loop->to[0]) == VAR_DECL)
     dynamic = true;
 
-  gfc_trans_create_temp_array (&loop->pre, &loop->post, loop, &ss->data.info,
+  gfc_trans_create_temp_array (&loop->pre, &loop->post, loop, ss,
                               type, NULL_TREE, dynamic, true, false, where);
 
   desc = ss->data.info.descriptor;
@@ -2095,8 +2123,9 @@ finish:
    loop bounds.  */
 
 static void
-gfc_set_vector_loop_bounds (gfc_loopinfo * loop, gfc_ss_info * info)
+set_vector_loop_bounds (gfc_loopinfo * loop, gfc_ss * ss)
 {
+  gfc_array_info *info;
   gfc_se se;
   tree tmp;
   tree desc;
@@ -2104,9 +2133,11 @@ gfc_set_vector_loop_bounds (gfc_loopinfo * loop, gfc_ss_info * info)
   int n;
   int dim;
 
+  info = &ss->data.info;
+
   for (n = 0; n < loop->dimen; n++)
     {
-      dim = info->dim[n];
+      dim = ss->dim[n];
       if (info->ref->u.ar.dimen_type[dim] == DIMEN_VECTOR
          && loop->to[n] == NULL)
        {
@@ -2115,7 +2146,7 @@ gfc_set_vector_loop_bounds (gfc_loopinfo * loop, gfc_ss_info * info)
             difference between the vector's upper and lower bounds.  */
          gcc_assert (loop->from[n] == gfc_index_zero_node);
          gcc_assert (info->subscript[dim]
-                     && info->subscript[dim]->type == GFC_SS_VECTOR);
+                     && info->subscript[dim]->info->type == GFC_SS_VECTOR);
 
          gfc_init_se (&se, NULL);
          desc = info->subscript[dim]->data.info.descriptor;
@@ -2140,6 +2171,8 @@ gfc_add_loop_ss_code (gfc_loopinfo * loop, gfc_ss * ss, bool subscript,
                      locus * where)
 {
   gfc_se se;
+  gfc_ss_info *ss_info;
+  gfc_expr *expr;
   int n;
 
   /* TODO: This can generate bad code if there are ordering dependencies,
@@ -2150,16 +2183,19 @@ gfc_add_loop_ss_code (gfc_loopinfo * loop, gfc_ss * ss, bool subscript,
     {
       gcc_assert (ss);
 
-      switch (ss->type)
+      ss_info = ss->info;
+      expr = ss_info->expr;
+
+      switch (ss_info->type)
        {
        case GFC_SS_SCALAR:
          /* Scalar expression.  Evaluate this now.  This includes elemental
             dimension indices, but not array section bounds.  */
          gfc_init_se (&se, NULL);
-         gfc_conv_expr (&se, ss->expr);
+         gfc_conv_expr (&se, expr);
          gfc_add_block_to_block (&loop->pre, &se.pre);
 
-         if (ss->expr->ts.type != BT_CHARACTER)
+         if (expr->ts.type != BT_CHARACTER)
            {
              /* Move the evaluation of scalar expressions outside the
                 scalarization loop, except for WHERE assignments.  */
@@ -2172,20 +2208,20 @@ gfc_add_loop_ss_code (gfc_loopinfo * loop, gfc_ss * ss, bool subscript,
          else
            gfc_add_block_to_block (&loop->post, &se.post);
 
-         ss->data.scalar.expr = se.expr;
-         ss->string_length = se.string_length;
+         ss_info->data.scalar.value = se.expr;
+         ss_info->string_length = se.string_length;
          break;
 
        case GFC_SS_REFERENCE:
          /* Scalar argument to elemental procedure.  Evaluate this
             now.  */
          gfc_init_se (&se, NULL);
-         gfc_conv_expr (&se, ss->expr);
+         gfc_conv_expr (&se, expr);
          gfc_add_block_to_block (&loop->pre, &se.pre);
          gfc_add_block_to_block (&loop->post, &se.post);
 
-         ss->data.scalar.expr = gfc_evaluate_now (se.expr, &loop->pre);
-         ss->string_length = se.string_length;
+         ss_info->data.scalar.value = gfc_evaluate_now (se.expr, &loop->pre);
+         ss_info->string_length = se.string_length;
          break;
 
        case GFC_SS_SECTION:
@@ -2195,13 +2231,13 @@ gfc_add_loop_ss_code (gfc_loopinfo * loop, gfc_ss * ss, bool subscript,
              gfc_add_loop_ss_code (loop, ss->data.info.subscript[n], true,
                                    where);
 
-         gfc_set_vector_loop_bounds (loop, &ss->data.info);
+         set_vector_loop_bounds (loop, ss);
          break;
 
        case GFC_SS_VECTOR:
          /* Get the vector's descriptor and store it in SS.  */
          gfc_init_se (&se, NULL);
-         gfc_conv_expr_descriptor (&se, ss->expr, gfc_walk_expr (ss->expr));
+         gfc_conv_expr_descriptor (&se, expr, gfc_walk_expr (expr));
          gfc_add_block_to_block (&loop->pre, &se.pre);
          gfc_add_block_to_block (&loop->post, &se.post);
          ss->data.info.descriptor = se.expr;
@@ -2217,22 +2253,22 @@ gfc_add_loop_ss_code (gfc_loopinfo * loop, gfc_ss * ss, bool subscript,
          gfc_init_se (&se, NULL);
          se.loop = loop;
          se.ss = ss;
-         gfc_conv_expr (&se, ss->expr);
+         gfc_conv_expr (&se, expr);
          gfc_add_block_to_block (&loop->pre, &se.pre);
          gfc_add_block_to_block (&loop->post, &se.post);
-         ss->string_length = se.string_length;
+         ss_info->string_length = se.string_length;
          break;
 
        case GFC_SS_CONSTRUCTOR:
-         if (ss->expr->ts.type == BT_CHARACTER
-               && ss->string_length == NULL
-               && ss->expr->ts.u.cl
-               && ss->expr->ts.u.cl->length)
+         if (expr->ts.type == BT_CHARACTER
+             && ss_info->string_length == NULL
+             && expr->ts.u.cl
+             && expr->ts.u.cl->length)
            {
              gfc_init_se (&se, NULL);
-             gfc_conv_expr_type (&se, ss->expr->ts.u.cl->length,
+             gfc_conv_expr_type (&se, expr->ts.u.cl->length,
                                  gfc_charlen_type_node);
-             ss->string_length = se.expr;
+             ss_info->string_length = se.expr;
              gfc_add_block_to_block (&loop->pre, &se.pre);
              gfc_add_block_to_block (&loop->post, &se.post);
            }
@@ -2258,16 +2294,19 @@ static void
 gfc_conv_ss_descriptor (stmtblock_t * block, gfc_ss * ss, int base)
 {
   gfc_se se;
+  gfc_ss_info *ss_info;
   tree tmp;
 
+  ss_info = ss->info;
+
   /* Get the descriptor for the array to be scalarized.  */
-  gcc_assert (ss->expr->expr_type == EXPR_VARIABLE);
+  gcc_assert (ss_info->expr->expr_type == EXPR_VARIABLE);
   gfc_init_se (&se, NULL);
   se.descriptor_only = 1;
-  gfc_conv_expr_lhs (&se, ss->expr);
+  gfc_conv_expr_lhs (&se, ss_info->expr);
   gfc_add_block_to_block (block, &se.pre);
   ss->data.info.descriptor = se.expr;
-  ss->string_length = se.string_length;
+  ss_info->string_length = se.string_length;
 
   if (base)
     {
@@ -2430,42 +2469,25 @@ gfc_conv_array_ubound (tree descriptor, int dim)
 /* Generate code to perform an array index bound check.  */
 
 static tree
-gfc_trans_array_bound_check (gfc_se * se, tree descriptor, tree index, int n,
-                            locus * where, bool check_upper)
+trans_array_bound_check (gfc_se * se, gfc_ss *ss, tree index, int n,
+                        locus * where, bool check_upper)
 {
   tree fault;
   tree tmp_lo, tmp_up;
+  tree descriptor;
   char *msg;
   const char * name = NULL;
 
   if (!(gfc_option.rtcheck & GFC_RTCHECK_BOUNDS))
     return index;
 
+  descriptor = ss->data.info.descriptor;
+
   index = gfc_evaluate_now (index, &se->pre);
 
   /* We find a name for the error message.  */
-  if (se->ss)
-    name = se->ss->expr->symtree->name;
-
-  if (!name && se->loop && se->loop->ss && se->loop->ss->expr
-      && se->loop->ss->expr->symtree)
-    name = se->loop->ss->expr->symtree->name;
-
-  if (!name && se->loop && se->loop->ss && se->loop->ss->loop_chain
-      && se->loop->ss->loop_chain->expr
-      && se->loop->ss->loop_chain->expr->symtree)
-    name = se->loop->ss->loop_chain->expr->symtree->name;
-
-  if (!name && se->loop && se->loop->ss && se->loop->ss->expr)
-    {
-      if (se->loop->ss->expr->expr_type == EXPR_FUNCTION
-         && se->loop->ss->expr->value.function.name)
-       name = se->loop->ss->expr->value.function.name;
-      else
-       if (se->loop->ss->type == GFC_SS_CONSTRUCTOR
-           || se->loop->ss->type == GFC_SS_SCALAR)
-         name = "unnamed constant";
-    }
+  name = ss->info->expr->symtree->n.sym->name;
+  gcc_assert (name != NULL);
 
   if (TREE_CODE (descriptor) == VAR_DECL)
     name = IDENTIFIER_POINTER (DECL_NAME (descriptor));
@@ -2525,13 +2547,16 @@ gfc_trans_array_bound_check (gfc_se * se, tree descriptor, tree index, int n,
    DIM is the array dimension, I is the loop dimension.  */
 
 static tree
-gfc_conv_array_index_offset (gfc_se * se, gfc_ss_info * info, int dim, int i,
-                            gfc_array_ref * ar, tree stride)
+conv_array_index_offset (gfc_se * se, gfc_ss * ss, int dim, int i,
+                        gfc_array_ref * ar, tree stride)
 {
+  gfc_array_info *info;
   tree index;
   tree desc;
   tree data;
 
+  info = &ss->data.info;
+
   /* Get the index into the array for this dimension.  */
   if (ar)
     {
@@ -2544,20 +2569,19 @@ gfc_conv_array_index_offset (gfc_se * se, gfc_ss_info * info, int dim, int i,
        case DIMEN_ELEMENT:
          /* Elemental dimension.  */
          gcc_assert (info->subscript[dim]
-                     && info->subscript[dim]->type == GFC_SS_SCALAR);
+                     && info->subscript[dim]->info->type == GFC_SS_SCALAR);
          /* We've already translated this value outside the loop.  */
-         index = info->subscript[dim]->data.scalar.expr;
+         index = info->subscript[dim]->info->data.scalar.value;
 
-         index = gfc_trans_array_bound_check (se, info->descriptor,
-                       index, dim, &ar->where,
-                       ar->as->type != AS_ASSUMED_SIZE
-                       || dim < ar->dimen - 1);
+         index = trans_array_bound_check (se, ss, index, dim, &ar->where,
+                                          ar->as->type != AS_ASSUMED_SIZE
+                                          || dim < ar->dimen - 1);
          break;
 
        case DIMEN_VECTOR:
          gcc_assert (info && se->loop);
          gcc_assert (info->subscript[dim]
-                     && info->subscript[dim]->type == GFC_SS_VECTOR);
+                     && info->subscript[dim]->info->type == GFC_SS_VECTOR);
          desc = info->subscript[dim]->data.info.descriptor;
 
          /* Get a zero-based index into the vector.  */
@@ -2578,10 +2602,9 @@ gfc_conv_array_index_offset (gfc_se * se, gfc_ss_info * info, int dim, int i,
          index = fold_convert (gfc_array_index_type, index);
 
          /* Do any bounds checking on the final info->descriptor index.  */
-         index = gfc_trans_array_bound_check (se, info->descriptor,
-                       index, dim, &ar->where,
-                       ar->as->type != AS_ASSUMED_SIZE
-                       || dim < ar->dimen - 1);
+         index = trans_array_bound_check (se, ss, index, dim, &ar->where,
+                                          ar->as->type != AS_ASSUMED_SIZE
+                                          || dim < ar->dimen - 1);
          break;
 
        case DIMEN_RANGE:
@@ -2613,11 +2636,11 @@ gfc_conv_array_index_offset (gfc_se * se, gfc_ss_info * info, int dim, int i,
       /* Pointer functions can have stride[0] different from unity. 
         Use the stride returned by the function call and stored in
         the descriptor for the temporary.  */ 
-      if (se->ss && se->ss->type == GFC_SS_FUNCTION
-           && se->ss->expr
-           && se->ss->expr->symtree
-           && se->ss->expr->symtree->n.sym->result
-           && se->ss->expr->symtree->n.sym->result->attr.pointer)
+      if (se->ss && se->ss->info->type == GFC_SS_FUNCTION
+         && se->ss->info->expr
+         && se->ss->info->expr->symtree
+         && se->ss->info->expr->symtree->n.sym->result
+         && se->ss->info->expr->symtree->n.sym->result->attr.pointer)
        stride = gfc_conv_descriptor_stride_get (info->descriptor,
                                                 gfc_rank_cst[dim]);
 
@@ -2640,31 +2663,33 @@ gfc_conv_array_index_offset (gfc_se * se, gfc_ss_info * info, int dim, int i,
 static void
 gfc_conv_scalarized_array_ref (gfc_se * se, gfc_array_ref * ar)
 {
-  gfc_ss_info *info;
+  gfc_array_info *info;
   tree decl = NULL_TREE;
   tree index;
   tree tmp;
+  gfc_ss *ss;
+  gfc_expr *expr;
   int n;
 
-  info = &se->ss->data.info;
+  ss = se->ss;
+  expr = ss->info->expr;
+  info = &ss->data.info;
   if (ar)
     n = se->loop->order[0];
   else
     n = 0;
 
-  index = gfc_conv_array_index_offset (se, info, info->dim[n], n, ar,
-                                      info->stride0);
+  index = conv_array_index_offset (se, ss, ss->dim[n], n, ar, info->stride0);
   /* Add the offset for this dimension to the stored offset for all other
      dimensions.  */
   if (!integer_zerop (info->offset))
     index = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type,
                             index, info->offset);
 
-  if (se->ss->expr && is_subref_array (se->ss->expr))
-    decl = se->ss->expr->symtree->n.sym->backend_decl;
+  if (expr && is_subref_array (expr))
+    decl = expr->symtree->n.sym->backend_decl;
 
-  tmp = build_fold_indirect_ref_loc (input_location,
-                                info->data);
+  tmp = build_fold_indirect_ref_loc (input_location, info->data);
   se->expr = gfc_build_array_ref (tmp, index, decl);
 }
 
@@ -2674,7 +2699,7 @@ gfc_conv_scalarized_array_ref (gfc_se * se, gfc_array_ref * ar)
 void
 gfc_conv_tmp_array_ref (gfc_se * se)
 {
-  se->string_length = se->ss->string_length;
+  se->string_length = se->ss->info->string_length;
   gfc_conv_scalarized_array_ref (se, NULL);
   gfc_advance_se_ss_chain (se);
 }
@@ -2830,6 +2855,33 @@ gfc_conv_array_ref (gfc_se * se, gfc_array_ref * ar, gfc_symbol * sym,
 }
 
 
+/* Add the offset corresponding to array's ARRAY_DIM dimension and loop's
+   LOOP_DIM dimension (if any) to array's offset.  */
+
+static void
+add_array_offset (stmtblock_t *pblock, gfc_loopinfo *loop, gfc_ss *ss,
+                 gfc_array_ref *ar, int array_dim, int loop_dim)
+{
+  gfc_se se;
+  gfc_array_info *info;
+  tree stride, index;
+
+  info = &ss->data.info;
+
+  gfc_init_se (&se, NULL);
+  se.loop = loop;
+  se.expr = info->descriptor;
+  stride = gfc_conv_array_stride (info->descriptor, array_dim);
+  index = conv_array_index_offset (&se, ss, array_dim, loop_dim, ar, stride);
+  gfc_add_block_to_block (pblock, &se.pre);
+
+  info->offset = fold_build2_loc (input_location, PLUS_EXPR,
+                                 gfc_array_index_type,
+                                 info->offset, index);
+  info->offset = gfc_evaluate_now (info->offset, pblock);
+}
+
+
 /* Generate the code to be executed immediately before entering a
    scalarization loop.  */
 
@@ -2837,11 +2889,10 @@ static void
 gfc_trans_preloop_setup (gfc_loopinfo * loop, int dim, int flag,
                         stmtblock_t * pblock)
 {
-  tree index;
   tree stride;
-  gfc_ss_info *info;
+  gfc_array_info *info;
+  gfc_ss_type ss_type;
   gfc_ss *ss;
-  gfc_se se;
   gfc_array_ref *ar;
   int i;
 
@@ -2852,35 +2903,35 @@ gfc_trans_preloop_setup (gfc_loopinfo * loop, int dim, int flag,
       if ((ss->useflags & flag) == 0)
        continue;
 
-      if (ss->type != GFC_SS_SECTION
-         && ss->type != GFC_SS_FUNCTION && ss->type != GFC_SS_CONSTRUCTOR
-         && ss->type != GFC_SS_COMPONENT)
+      ss_type = ss->info->type;
+      if (ss_type != GFC_SS_SECTION
+         && ss_type != GFC_SS_FUNCTION
+         && ss_type != GFC_SS_CONSTRUCTOR
+         && ss_type != GFC_SS_COMPONENT)
        continue;
 
       info = &ss->data.info;
 
-      if (dim >= info->dimen)
-       continue;
+      gcc_assert (dim < ss->dimen);
+      gcc_assert (ss->dimen == loop->dimen);
 
       if (info->ref)
-       {
-         ar = &info->ref->u.ar;
-         i = loop->order[dim + 1];
-       }
+       ar = &info->ref->u.ar;
       else
-       {
-         ar = NULL;
-         i = dim + 1;
-       }
+       ar = NULL;
 
+      if (dim == loop->dimen - 1)
+       i = 0;
+      else
+       i = dim + 1;
 
-      if (dim == info->dimen - 1)
+      /* For the time being, there is no loop reordering.  */
+      gcc_assert (i == loop->order[i]);
+      i = loop->order[i];
+
+      if (dim == loop->dimen - 1)
        {
-         i = loop->order[0];
-         /* For the time being, the innermost loop is unconditionally on
-            the first dimension of the scalarization loop.  */
-         gcc_assert (i == 0);
-         stride = gfc_conv_array_stride (info->descriptor, info->dim[i]);
+         stride = gfc_conv_array_stride (info->descriptor, ss->dim[i]);
 
          /* Calculate the stride of the innermost loop.  Hopefully this will
             allow the backend optimizers to do their stuff more effectively.
@@ -2897,36 +2948,13 @@ gfc_trans_preloop_setup (gfc_loopinfo * loop, int dim, int flag,
                  if (ar->dimen_type[i] != DIMEN_ELEMENT)
                    continue;
 
-                 gfc_init_se (&se, NULL);
-                 se.loop = loop;
-                 se.expr = info->descriptor;
-                 stride = gfc_conv_array_stride (info->descriptor, i);
-                 index = gfc_conv_array_index_offset (&se, info, i, -1,
-                                                      ar, stride);
-                 gfc_add_block_to_block (pblock, &se.pre);
-
-                 info->offset = fold_build2_loc (input_location, PLUS_EXPR,
-                                                 gfc_array_index_type,
-                                                 info->offset, index);
-                 info->offset = gfc_evaluate_now (info->offset, pblock);
+                 add_array_offset (pblock, loop, ss, ar, i, /* unused */ -1);
                }
            }
        }
       else
-       {
-         /* Add the offset for the previous loop dimension.  */
-         gfc_init_se (&se, NULL);
-         se.loop = loop;
-         se.expr = info->descriptor;
-         stride = gfc_conv_array_stride (info->descriptor, info->dim[i]);
-         index = gfc_conv_array_index_offset (&se, info, info->dim[i], i,
-                                              ar, stride);
-         gfc_add_block_to_block (pblock, &se.pre);
-         info->offset = fold_build2_loc (input_location, PLUS_EXPR,
-                                         gfc_array_index_type, info->offset,
-                                         index);
-         info->offset = gfc_evaluate_now (info->offset, pblock);
-       }
+       /* Add the offset for the previous loop dimension.  */
+       add_array_offset (pblock, loop, ss, ar, ss->dim[i], i);
 
       /* Remember this offset for the second loop.  */
       if (dim == loop->temp_dim - 1)
@@ -3113,7 +3141,7 @@ gfc_trans_scalarizing_loops (gfc_loopinfo * loop, stmtblock_t * body)
   gfc_add_expr_to_block (&loop->pre, tmp);
 
   /* Clear all the used flags.  */
-  for (ss = loop->ss; ss; ss = ss->loop_chain)
+  for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain)
     ss->useflags = 0;
 }
 
@@ -3146,12 +3174,16 @@ gfc_trans_scalarized_loop_boundary (gfc_loopinfo * loop, stmtblock_t * body)
   /* Restore the initial offsets.  */
   for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain)
     {
+      gfc_ss_type ss_type;
+
       if ((ss->useflags & 2) == 0)
        continue;
 
-      if (ss->type != GFC_SS_SECTION
-         && ss->type != GFC_SS_FUNCTION && ss->type != GFC_SS_CONSTRUCTOR
-         && ss->type != GFC_SS_COMPONENT)
+      ss_type = ss->info->type;
+      if (ss_type != GFC_SS_SECTION
+         && ss_type != GFC_SS_FUNCTION
+         && ss_type != GFC_SS_CONSTRUCTOR
+         && ss_type != GFC_SS_COMPONENT)
        continue;
 
       ss->data.info.offset = ss->data.info.saved_offset;
@@ -3216,10 +3248,10 @@ gfc_conv_section_startstride (gfc_loopinfo * loop, gfc_ss * ss, int dim)
   gfc_expr *stride = NULL;
   tree desc;
   gfc_se se;
-  gfc_ss_info *info;
+  gfc_array_info *info;
   gfc_array_ref *ar;
 
-  gcc_assert (ss->type == GFC_SS_SECTION);
+  gcc_assert (ss->info->type == GFC_SS_SECTION);
 
   info = &ss->data.info;
   ar = &info->ref->u.ar;
@@ -3276,25 +3308,25 @@ gfc_conv_ss_startstride (gfc_loopinfo * loop)
   /* Determine the rank of the loop.  */
   for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain)
     {
-      switch (ss->type)
+      switch (ss->info->type)
        {
        case GFC_SS_SECTION:
        case GFC_SS_CONSTRUCTOR:
        case GFC_SS_FUNCTION:
        case GFC_SS_COMPONENT:
-         loop->dimen = ss->data.info.dimen;
+         loop->dimen = ss->dimen;
          goto done;
 
        /* As usual, lbound and ubound are exceptions!.  */
        case GFC_SS_INTRINSIC:
-         switch (ss->expr->value.function.isym->id)
+         switch (ss->info->expr->value.function.isym->id)
            {
            case GFC_ISYM_LBOUND:
            case GFC_ISYM_UBOUND:
            case GFC_ISYM_LCOBOUND:
            case GFC_ISYM_UCOBOUND:
            case GFC_ISYM_THIS_IMAGE:
-             loop->dimen = ss->data.info.dimen;
+             loop->dimen = ss->dimen;
              goto done;
 
            default:
@@ -3314,21 +3346,29 @@ done:
   /* Loop over all the SS in the chain.  */
   for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain)
     {
-      if (ss->expr && ss->expr->shape && !ss->shape)
-       ss->shape = ss->expr->shape;
+      gfc_ss_info *ss_info;
+      gfc_array_info *info;
+      gfc_expr *expr;
+
+      ss_info = ss->info;
+      expr = ss_info->expr;
+      info = &ss->data.info;
+
+      if (expr && expr->shape && !info->shape)
+       info->shape = expr->shape;
 
-      switch (ss->type)
+      switch (ss_info->type)
        {
        case GFC_SS_SECTION:
          /* Get the descriptor for the array.  */
          gfc_conv_ss_descriptor (&loop->pre, ss, !loop->array_parameter);
 
-         for (n = 0; n < ss->data.info.dimen; n++)
-           gfc_conv_section_startstride (loop, ss, ss->data.info.dim[n]);
+         for (n = 0; n < ss->dimen; n++)
+           gfc_conv_section_startstride (loop, ss, ss->dim[n]);
          break;
 
        case GFC_SS_INTRINSIC:
-         switch (ss->expr->value.function.isym->id)
+         switch (expr->value.function.isym->id)
            {
            /* Fall through to supply start and stride.  */
            case GFC_ISYM_LBOUND:
@@ -3344,11 +3384,13 @@ done:
 
        case GFC_SS_CONSTRUCTOR:
        case GFC_SS_FUNCTION:
-         for (n = 0; n < ss->data.info.dimen; n++)
+         for (n = 0; n < ss->dimen; n++)
            {
-             ss->data.info.start[n] = gfc_index_zero_node;
-             ss->data.info.end[n] = gfc_index_zero_node;
-             ss->data.info.stride[n] = gfc_index_one_node;
+             int dim = ss->dim[n];
+
+             ss->data.info.start[dim]  = gfc_index_zero_node;
+             ss->data.info.end[dim]    = gfc_index_zero_node;
+             ss->data.info.stride[dim] = gfc_index_one_node;
            }
          break;
 
@@ -3365,7 +3407,7 @@ done:
       tree end;
       tree size[GFC_MAX_DIMENSIONS];
       tree stride_pos, stride_neg, non_zerosized, tmp2, tmp3;
-      gfc_ss_info *info;
+      gfc_array_info *info;
       char *msg;
       int dim;
 
@@ -3377,14 +3419,23 @@ done:
       for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain)
        {
          stmtblock_t inner;
+         gfc_ss_info *ss_info;
+         gfc_expr *expr;
+         locus *expr_loc;
+         const char *expr_name;
 
-         if (ss->type != GFC_SS_SECTION)
+         ss_info = ss->info;
+         if (ss_info->type != GFC_SS_SECTION)
            continue;
 
          /* Catch allocatable lhs in f2003.  */
          if (gfc_option.flag_realloc_lhs && ss->is_alloc_lhs)
            continue;
 
+         expr = ss_info->expr;
+         expr_loc = &expr->where;
+         expr_name = expr->symtree->name;
+
          gfc_start_block (&inner);
 
          /* TODO: range checking for mapped dimensions.  */
@@ -3396,7 +3447,7 @@ done:
            {
              bool check_upper;
 
-             dim = info->dim[n];
+             dim = ss->dim[n];
              if (info->ref->u.ar.dimen_type[dim] != DIMEN_RANGE)
                continue;
 
@@ -3410,9 +3461,9 @@ done:
              tmp = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node,
                                     info->stride[dim], gfc_index_zero_node);
              asprintf (&msg, "Zero stride is not allowed, for dimension %d "
-                       "of array '%s'", dim + 1, ss->expr->symtree->name);
+                       "of array '%s'", dim + 1, expr_name);
              gfc_trans_runtime_check (true, false, tmp, &inner,
-                                      &ss->expr->where, msg);
+                                      expr_loc, msg);
              free (msg);
 
              desc = ss->data.info.descriptor;
@@ -3469,14 +3520,14 @@ done:
                                          non_zerosized, tmp2);
                  asprintf (&msg, "Index '%%ld' of dimension %d of array '%s' "
                            "outside of expected range (%%ld:%%ld)",
-                           dim + 1, ss->expr->symtree->name);
+                           dim + 1, expr_name);
                  gfc_trans_runtime_check (true, false, tmp, &inner,
-                                          &ss->expr->where, msg,
+                                          expr_loc, msg,
                     fold_convert (long_integer_type_node, info->start[dim]),
                     fold_convert (long_integer_type_node, lbound),
                     fold_convert (long_integer_type_node, ubound));
                  gfc_trans_runtime_check (true, false, tmp2, &inner,
-                                          &ss->expr->where, msg,
+                                          expr_loc, msg,
                     fold_convert (long_integer_type_node, info->start[dim]),
                     fold_convert (long_integer_type_node, lbound),
                     fold_convert (long_integer_type_node, ubound));
@@ -3491,9 +3542,9 @@ done:
                                         boolean_type_node, non_zerosized, tmp);
                  asprintf (&msg, "Index '%%ld' of dimension %d of array '%s' "
                            "below lower bound of %%ld",
-                           dim + 1, ss->expr->symtree->name);
+                           dim + 1, expr_name);
                  gfc_trans_runtime_check (true, false, tmp, &inner,
-                                          &ss->expr->where, msg,
+                                          expr_loc, msg,
                     fold_convert (long_integer_type_node, info->start[dim]),
                     fold_convert (long_integer_type_node, lbound));
                  free (msg);
@@ -3523,14 +3574,14 @@ done:
                                          boolean_type_node, non_zerosized, tmp3);
                  asprintf (&msg, "Index '%%ld' of dimension %d of array '%s' "
                            "outside of expected range (%%ld:%%ld)",
-                           dim + 1, ss->expr->symtree->name);
+                           dim + 1, expr_name);
                  gfc_trans_runtime_check (true, false, tmp2, &inner,
-                                          &ss->expr->where, msg,
+                                          expr_loc, msg,
                     fold_convert (long_integer_type_node, tmp),
                     fold_convert (long_integer_type_node, ubound), 
                     fold_convert (long_integer_type_node, lbound));
                  gfc_trans_runtime_check (true, false, tmp3, &inner,
-                                          &ss->expr->where, msg,
+                                          expr_loc, msg,
                     fold_convert (long_integer_type_node, tmp),
                     fold_convert (long_integer_type_node, ubound), 
                     fold_convert (long_integer_type_node, lbound));
@@ -3540,9 +3591,9 @@ done:
                {
                  asprintf (&msg, "Index '%%ld' of dimension %d of array '%s' "
                            "below lower bound of %%ld",
-                           dim + 1, ss->expr->symtree->name);
+                           dim + 1, expr_name);
                  gfc_trans_runtime_check (true, false, tmp2, &inner,
-                                          &ss->expr->where, msg,
+                                          expr_loc, msg,
                     fold_convert (long_integer_type_node, tmp),
                     fold_convert (long_integer_type_node, lbound));
                  free (msg);
@@ -3569,10 +3620,10 @@ done:
                                          boolean_type_node, tmp, size[n]);
                  asprintf (&msg, "Array bound mismatch for dimension %d "
                            "of array '%s' (%%ld/%%ld)",
-                           dim + 1, ss->expr->symtree->name);
+                           dim + 1, expr_name);
 
                  gfc_trans_runtime_check (true, false, tmp3, &inner,
-                                          &ss->expr->where, msg,
+                                          expr_loc, msg,
                        fold_convert (long_integer_type_node, tmp),
                        fold_convert (long_integer_type_node, size[n]));
 
@@ -3586,10 +3637,10 @@ done:
 
          /* For optional arguments, only check bounds if the argument is
             present.  */
-         if (ss->expr->symtree->n.sym->attr.optional
-             || ss->expr->symtree->n.sym->attr.not_always_present)
+         if (expr->symtree->n.sym->attr.optional
+             || expr->symtree->n.sym->attr.not_always_present)
            tmp = build3_v (COND_EXPR,
-                           gfc_conv_expr_present (ss->expr->symtree->n.sym),
+                           gfc_conv_expr_present (expr->symtree->n.sym),
                            tmp, build_empty_stmt (input_location));
 
          gfc_add_expr_to_block (&block, tmp);
@@ -3642,12 +3693,16 @@ gfc_could_be_alias (gfc_ss * lss, gfc_ss * rss)
 {
   gfc_ref *lref;
   gfc_ref *rref;
+  gfc_expr *lexpr, *rexpr;
   gfc_symbol *lsym;
   gfc_symbol *rsym;
   bool lsym_pointer, lsym_target, rsym_pointer, rsym_target;
 
-  lsym = lss->expr->symtree->n.sym;
-  rsym = rss->expr->symtree->n.sym;
+  lexpr = lss->info->expr;
+  rexpr = rss->info->expr;
+
+  lsym = lexpr->symtree->n.sym;
+  rsym = rexpr->symtree->n.sym;
 
   lsym_pointer = lsym->attr.pointer;
   lsym_target = lsym->attr.target;
@@ -3665,7 +3720,7 @@ gfc_could_be_alias (gfc_ss * lss, gfc_ss * rss)
   /* For derived types we must check all the component types.  We can ignore
      array references as these will have the same base type as the previous
      component ref.  */
-  for (lref = lss->expr->ref; lref != lss->data.info.ref; lref = lref->next)
+  for (lref = lexpr->ref; lref != lss->data.info.ref; lref = lref->next)
     {
       if (lref->type != REF_COMPONENT)
        continue;
@@ -3685,7 +3740,7 @@ gfc_could_be_alias (gfc_ss * lss, gfc_ss * rss)
            return 1;
        }
 
-      for (rref = rss->expr->ref; rref != rss->data.info.ref;
+      for (rref = rexpr->ref; rref != rss->data.info.ref;
           rref = rref->next)
        {
          if (rref->type != REF_COMPONENT)
@@ -3720,7 +3775,7 @@ gfc_could_be_alias (gfc_ss * lss, gfc_ss * rss)
   lsym_pointer = lsym->attr.pointer;
   lsym_target = lsym->attr.target;
 
-  for (rref = rss->expr->ref; rref != rss->data.info.ref; rref = rref->next)
+  for (rref = rexpr->ref; rref != rss->data.info.ref; rref = rref->next)
     {
       if (rref->type != REF_COMPONENT)
        break;
@@ -3756,20 +3811,25 @@ gfc_conv_resolve_dependencies (gfc_loopinfo * loop, gfc_ss * dest,
   gfc_ss *ss;
   gfc_ref *lref;
   gfc_ref *rref;
+  gfc_expr *dest_expr;
+  gfc_expr *ss_expr;
   int nDepend = 0;
   int i, j;
 
   loop->temp_ss = NULL;
+  dest_expr = dest->info->expr;
 
   for (ss = rss; ss != gfc_ss_terminator; ss = ss->next)
     {
-      if (ss->type != GFC_SS_SECTION)
+      if (ss->info->type != GFC_SS_SECTION)
        continue;
 
-      if (dest->expr->symtree->n.sym != ss->expr->symtree->n.sym)
+      ss_expr = ss->info->expr;
+
+      if (dest_expr->symtree->n.sym != ss_expr->symtree->n.sym)
        {
          if (gfc_could_be_alias (dest, ss)
-               || gfc_are_equivalenced_arrays (dest->expr, ss->expr))
+             || gfc_are_equivalenced_arrays (dest_expr, ss_expr))
            {
              nDepend = 1;
              break;
@@ -3777,18 +3837,18 @@ gfc_conv_resolve_dependencies (gfc_loopinfo * loop, gfc_ss * dest,
        }
       else
        {
-         lref = dest->expr->ref;
-         rref = ss->expr->ref;
+         lref = dest_expr->ref;
+         rref = ss_expr->ref;
 
          nDepend = gfc_dep_resolver (lref, rref, &loop->reverse[0]);
 
          if (nDepend == 1)
            break;
 
-         for (i = 0; i < dest->data.info.dimen; i++)
-           for (j = 0; j < ss->data.info.dimen; j++)
+         for (i = 0; i < dest->dimen; i++)
+           for (j = 0; j < ss->dimen; j++)
              if (i != j
-                 && dest->data.info.dim[i] == ss->data.info.dim[j])
+                 && dest->dim[i] == ss->dim[j])
                {
                  /* If we don't access array elements in the same order,
                     there is a dependency.  */
@@ -3837,11 +3897,11 @@ temporary:
 
   if (nDepend == 1)
     {
-      tree base_type = gfc_typenode_for_spec (&dest->expr->ts);
+      tree base_type = gfc_typenode_for_spec (&dest_expr->ts);
       if (GFC_ARRAY_TYPE_P (base_type)
          || GFC_DESCRIPTOR_TYPE_P (base_type))
        base_type = gfc_get_element_type (base_type);
-      loop->temp_ss = gfc_get_temp_ss (base_type, dest->string_length,
+      loop->temp_ss = gfc_get_temp_ss (base_type, dest->info->string_length,
                                       loop->dimen);
       gfc_add_ss_to_loop (loop, loop->temp_ss);
     }
@@ -3860,9 +3920,9 @@ void
 gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
 {
   int n, dim, spec_dim;
-  gfc_ss_info *info;
-  gfc_ss_info *specinfo;
-  gfc_ss *ss;
+  gfc_array_info *info;
+  gfc_array_info *specinfo;
+  gfc_ss *ss, *tmp_ss;
   tree tmp;
   gfc_ss *loopspec[GFC_MAX_DIMENSIONS];
   bool dynamic[GFC_MAX_DIMENSIONS];
@@ -3878,16 +3938,21 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
         loop for this dimension.  We try to pick the simplest term.  */
       for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain)
        {
-         if (ss->type == GFC_SS_SCALAR || ss->type == GFC_SS_REFERENCE)
+         gfc_ss_type ss_type;
+
+         ss_type = ss->info->type;
+         if (ss_type == GFC_SS_SCALAR
+             || ss_type == GFC_SS_TEMP
+             || ss_type == GFC_SS_REFERENCE)
            continue;
 
          info = &ss->data.info;
-         dim = info->dim[n];
+         dim = ss->dim[n];
 
          if (loopspec[n] != NULL)
            {
              specinfo = &loopspec[n]->data.info;
-             spec_dim = specinfo->dim[n];
+             spec_dim = loopspec[n]->dim[n];
            }
          else
            {
@@ -3896,19 +3961,19 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
              spec_dim = 0;
            }
 
-         if (ss->shape)
+         if (info->shape)
            {
-             gcc_assert (ss->shape[dim]);
+             gcc_assert (info->shape[dim]);
              /* The frontend has worked out the size for us.  */
              if (!loopspec[n]
-                 || !loopspec[n]->shape
+                 || !specinfo->shape
                  || !integer_zerop (specinfo->start[spec_dim]))
                /* Prefer zero-based descriptors if possible.  */
                loopspec[n] = ss;
              continue;
            }
 
-         if (ss->type == GFC_SS_CONSTRUCTOR)
+         if (ss_type == GFC_SS_CONSTRUCTOR)
            {
              gfc_constructor_base base;
              /* An unknown size constructor will always be rank one.
@@ -3920,7 +3985,7 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
                 can be determined at compile time.  Prefer not to otherwise,
                 since the general case involves realloc, and it's better to
                 avoid that overhead if possible.  */
-             base = ss->expr->value.constructor;
+             base = ss->info->expr->value.constructor;
              dynamic[n] = gfc_get_array_constructor_size (&i, base);
              if (!dynamic[n] || !loopspec[n])
                loopspec[n] = ss;
@@ -3929,7 +3994,7 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
 
          /* TODO: Pick the best bound if we have a choice between a
             function and something else.  */
-         if (ss->type == GFC_SS_FUNCTION)
+         if (ss_type == GFC_SS_FUNCTION)
            {
              loopspec[n] = ss;
              continue;
@@ -3940,7 +4005,7 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
          if (loopspec[n] && ss->is_alloc_lhs)
            continue;
 
-         if (ss->type != GFC_SS_SECTION)
+         if (ss_type != GFC_SS_SECTION)
            continue;
 
          if (!loopspec[n])
@@ -3952,7 +4017,7 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
             known lower bound
             known upper bound
           */
-         else if ((loopspec[n]->type == GFC_SS_CONSTRUCTOR && dynamic[n])
+         else if ((loopspec[n]->info->type == GFC_SS_CONSTRUCTOR && dynamic[n])
                   || n >= loop->dimen)
            loopspec[n] = ss;
          else if (integer_onep (info->stride[dim])
@@ -3975,15 +4040,15 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
       gcc_assert (loopspec[n]);
 
       info = &loopspec[n]->data.info;
-      dim = info->dim[n];
+      dim = loopspec[n]->dim[n];
 
       /* Set the extents of this range.  */
-      cshape = loopspec[n]->shape;
+      cshape = info->shape;
       if (cshape && INTEGER_CST_P (info->start[dim])
          && INTEGER_CST_P (info->stride[dim]))
        {
          loop->from[n] = info->start[dim];
-         mpz_set (i, cshape[get_array_ref_dim (info, n)]);
+         mpz_set (i, cshape[get_array_ref_dim (loopspec[n], n)]);
          mpz_sub_ui (i, i, 1);
          /* To = from + (size - 1) * stride.  */
          tmp = gfc_conv_mpz_to_tree (i, gfc_index_integer_kind);
@@ -3998,7 +4063,7 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
       else
        {
          loop->from[n] = info->start[dim];
-         switch (loopspec[n]->type)
+         switch (loopspec[n]->info->type)
            {
            case GFC_SS_CONSTRUCTOR:
              /* The upper bound is calculated when we expand the
@@ -4051,30 +4116,30 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
      allocating the temporary.  */
   gfc_add_loop_ss_code (loop, loop->ss, false, where);
 
+  tmp_ss = loop->temp_ss;
   /* If we want a temporary then create it.  */
-  if (loop->temp_ss != NULL)
+  if (tmp_ss != NULL)
     {
-      gcc_assert (loop->temp_ss->type == GFC_SS_TEMP);
+      gfc_ss_info *tmp_ss_info;
+
+      tmp_ss_info = tmp_ss->info;
+      gcc_assert (tmp_ss_info->type == GFC_SS_TEMP);
 
       /* Make absolutely sure that this is a complete type.  */
-      if (loop->temp_ss->string_length)
-       loop->temp_ss->data.temp.type
+      if (tmp_ss_info->string_length)
+       tmp_ss_info->data.temp.type
                = gfc_get_character_type_len_for_eltype
-                       (TREE_TYPE (loop->temp_ss->data.temp.type),
-                        loop->temp_ss->string_length);
+                       (TREE_TYPE (tmp_ss_info->data.temp.type),
+                        tmp_ss_info->string_length);
 
-      tmp = loop->temp_ss->data.temp.type;
-      n = loop->temp_ss->data.temp.dimen;
-      memset (&loop->temp_ss->data.info, 0, sizeof (gfc_ss_info));
-      loop->temp_ss->type = GFC_SS_SECTION;
-      loop->temp_ss->data.info.dimen = n;
+      tmp = tmp_ss_info->data.temp.type;
+      memset (&loop->temp_ss->data.info, 0, sizeof (gfc_array_info));
+      tmp_ss_info->type = GFC_SS_SECTION;
 
-      gcc_assert (loop->temp_ss->data.info.dimen != 0);
-      for (n = 0; n < loop->temp_ss->data.info.dimen; n++)
-       loop->temp_ss->data.info.dim[n] = n;
+      gcc_assert (tmp_ss->dimen != 0);
 
       gfc_trans_create_temp_array (&loop->pre, &loop->post, loop,
-                                  &loop->temp_ss->data.info, tmp, NULL_TREE,
+                                  tmp_ss, tmp, NULL_TREE,
                                   false, true, false, where);
     }
 
@@ -4091,19 +4156,22 @@ gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where)
   /* Calculate the translation from loop variables to array indices.  */
   for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain)
     {
-      if (ss->type != GFC_SS_SECTION && ss->type != GFC_SS_COMPONENT
-           && ss->type != GFC_SS_CONSTRUCTOR)
+      gfc_ss_type ss_type;
 
+      ss_type = ss->info->type;
+      if (ss_type != GFC_SS_SECTION
+         && ss_type != GFC_SS_COMPONENT
+         && ss_type != GFC_SS_CONSTRUCTOR)
        continue;
 
       info = &ss->data.info;
 
-      for (n = 0; n < info->dimen; n++)
+      for (n = 0; n < ss->dimen; n++)
        {
          /* If we are specifying the range the delta is already set.  */
          if (loopspec[n] != ss)
            {
-             dim = ss->data.info.dim[n];
+             dim = ss->dim[n];
 
              /* Calculate the offset relative to the loop variable.
                 First multiply by the stride.  */
@@ -5661,15 +5729,17 @@ get_array_charlen (gfc_expr *expr, gfc_se *se)
     }
 }
 
+
 /* Helper function to check dimensions.  */
 static bool
-dim_ok (gfc_ss_info *info)
+transposed_dims (gfc_ss *ss)
 {
   int n;
-  for (n = 0; n < info->dimen; n++)
-    if (info->dim[n] != n)
-      return false;
-  return true;
+
+  for (n = 0; n < ss->dimen; n++)
+    if (ss->dim[n] != n)
+      return true;
+  return false;
 }
 
 /* Convert an array for passing as an actual argument.  Expressions and
@@ -5704,8 +5774,10 @@ dim_ok (gfc_ss_info *info)
 void
 gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
 {
+  gfc_ss_type ss_type;
+  gfc_ss_info *ss_info;
   gfc_loopinfo loop;
-  gfc_ss_info *info;
+  gfc_array_info *info;
   int need_tmp;
   int n;
   tree tmp;
@@ -5715,11 +5787,15 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
   tree offset;
   int full;
   bool subref_array_target = false;
-  gfc_expr *arg;
+  gfc_expr *arg, *ss_expr;
 
   gcc_assert (ss != NULL);
   gcc_assert (ss != gfc_ss_terminator);
 
+  ss_info = ss->info;
+  ss_type = ss_info->type;
+  ss_expr = ss_info->expr;
+
   /* Special case things we know we can pass easily.  */
   switch (expr->expr_type)
     {
@@ -5727,8 +5803,8 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
       /* If we have a linear array section, we can pass it directly.
         Otherwise we need to copy it into a temporary.  */
 
-      gcc_assert (ss->type == GFC_SS_SECTION);
-      gcc_assert (ss->expr == expr);
+      gcc_assert (ss_type == GFC_SS_SECTION);
+      gcc_assert (ss_expr == expr);
       info = &ss->data.info;
 
       /* Get the descriptor for the array.  */
@@ -5756,7 +5832,7 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
       else
        full = gfc_full_array_ref_p (info->ref, NULL);
 
-      if (full && dim_ok (info))
+      if (full && !transposed_dims (ss))
        {
          if (se->direct_byref && !se->byref_noassign)
            {
@@ -5806,7 +5882,7 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
 
       if (se->direct_byref)
        {
-         gcc_assert (ss->type == GFC_SS_FUNCTION && ss->expr == expr);
+         gcc_assert (ss_type == GFC_SS_FUNCTION && ss_expr == expr);
 
          /* For pointer assignments pass the descriptor directly.  */
          if (se->ss == NULL)
@@ -5818,16 +5894,16 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
          return;
        }
 
-      if (ss->expr != expr || ss->type != GFC_SS_FUNCTION)
+      if (ss_expr != expr || ss_type != GFC_SS_FUNCTION)
        {
-         if (ss->expr != expr)
+         if (ss_expr != expr)
            /* Elemental function.  */
            gcc_assert ((expr->value.function.esym != NULL
                         && expr->value.function.esym->attr.elemental)
                        || (expr->value.function.isym != NULL
                            && expr->value.function.isym->elemental));
          else
-           gcc_assert (ss->type == GFC_SS_INTRINSIC);
+           gcc_assert (ss_type == GFC_SS_INTRINSIC);
 
          need_tmp = 1;
          if (expr->ts.type == BT_CHARACTER
@@ -5846,7 +5922,7 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
 
     case EXPR_ARRAY:
       /* Constant array constructors don't need a temporary.  */
-      if (ss->type == GFC_SS_CONSTRUCTOR
+      if (ss_type == GFC_SS_CONSTRUCTOR
          && expr->ts.type != BT_CHARACTER
          && gfc_constant_array_constructor_p (expr->value.constructor))
        {
@@ -5899,8 +5975,8 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
                                       : NULL),
                                      loop.dimen);
 
-      se->string_length = loop.temp_ss->string_length;
-      gcc_assert (loop.temp_ss->data.temp.dimen == loop.dimen);
+      se->string_length = loop.temp_ss->info->string_length;
+      gcc_assert (loop.temp_ss->dimen == loop.dimen);
       gfc_add_ss_to_loop (&loop, loop.temp_ss);
     }
 
@@ -5953,10 +6029,10 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
 
       desc = loop.temp_ss->data.info.descriptor;
     }
-  else if (expr->expr_type == EXPR_FUNCTION && dim_ok (info))
+  else if (expr->expr_type == EXPR_FUNCTION && !transposed_dims (ss))
     {
       desc = info->descriptor;
-      se->string_length = ss->string_length;
+      se->string_length = ss_info->string_length;
     }
   else
     {
@@ -5973,7 +6049,7 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
       tree to;
       tree base;
 
-      ndim = info->ref ? info->ref->u.ar.dimen : info->dimen;
+      ndim = info->ref ? info->ref->u.ar.dimen : ss->dimen;
 
       if (se->want_coarray)
        {
@@ -6057,8 +6133,8 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
              && info->ref->u.ar.dimen_type[n] == DIMEN_ELEMENT)
            {
              gcc_assert (info->subscript[n]
-                     && info->subscript[n]->type == GFC_SS_SCALAR);
-             start = info->subscript[n]->data.scalar.expr;
+                         && info->subscript[n]->info->type == GFC_SS_SCALAR);
+             start = info->subscript[n]->info->data.scalar.value;
            }
          else
            {
@@ -6088,7 +6164,7 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
  
          /* look for the corresponding scalarizer dimension: dim.  */
          for (dim = 0; dim < ndim; dim++)
-           if (info->dim[dim] == n)
+           if (ss->dim[dim] == n)
              break;
 
          /* loop exited early: the DIM being looked for has been found.  */
@@ -7174,11 +7250,11 @@ gfc_alloc_allocatable_for_assignment (gfc_loopinfo *loop,
       /* Find the ss for the lhs.  */
       lss = loop->ss;
       for (; lss && lss != gfc_ss_terminator; lss = lss->loop_chain)
-       if (lss->expr && lss->expr->expr_type == EXPR_VARIABLE)
+       if (lss->info->expr && lss->info->expr->expr_type == EXPR_VARIABLE)
          break;
       if (lss == gfc_ss_terminator)
        return NULL_TREE;
-      expr1 = lss->expr;
+      expr1 = lss->info->expr;
     }
 
   /* Bail out if this is not a valid allocate on assignment.  */
@@ -7189,7 +7265,7 @@ gfc_alloc_allocatable_for_assignment (gfc_loopinfo *loop,
   /* Find the ss for the lhs.  */
   lss = loop->ss;
   for (; lss && lss != gfc_ss_terminator; lss = lss->loop_chain)
-    if (lss->expr == expr1)
+    if (lss->info->expr == expr1)
       break;
 
   if (lss == gfc_ss_terminator)
@@ -7199,7 +7275,7 @@ gfc_alloc_allocatable_for_assignment (gfc_loopinfo *loop,
      ss's for the operands. Any one of these will do.  */
   rss = loop->ss;
   for (; rss && rss != gfc_ss_terminator; rss = rss->loop_chain)
-    if (rss->expr != expr1 && rss != loop->temp_ss)
+    if (rss->info->expr != expr1 && rss != loop->temp_ss)
       break;
 
   if (expr2 && rss == gfc_ss_terminator)
@@ -7377,7 +7453,7 @@ gfc_alloc_allocatable_for_assignment (gfc_loopinfo *loop,
   for (n = 0; n < expr1->rank; n++)
     {
       tmp = gfc_conv_descriptor_lbound_get (desc, gfc_rank_cst[n]);
-      dim = lss->data.info.dim[n];
+      dim = lss->dim[n];
       tmp = fold_build2_loc (input_location, MINUS_EXPR,
                             gfc_array_index_type, tmp,
                             loop->from[dim]);
@@ -7635,7 +7711,7 @@ gfc_walk_array_ref (gfc_ss * ss, gfc_expr * expr, gfc_ref * ref)
       switch (ar->type)
        {
        case AR_ELEMENT:
-         for (n = ar->dimen + ar->codimen - 1; n >= 0; n--)
+         for (n = ar->dimen - 1; n >= 0; n--)
            ss = gfc_get_scalar_ss (ss, ar->start[n]);
          break;
 
@@ -7679,8 +7755,8 @@ gfc_walk_array_ref (gfc_ss * ss, gfc_expr * expr, gfc_ref * ref)
                case DIMEN_RANGE:
                   /* We don't add anything for sections, just remember this
                      dimension for later.  */
-                 newss->data.info.dim[newss->data.info.dimen] = n;
-                 newss->data.info.dimen++;
+                 newss->dim[newss->dimen] = n;
+                 newss->dimen++;
                  break;
 
                case DIMEN_VECTOR:
@@ -7690,8 +7766,8 @@ gfc_walk_array_ref (gfc_ss * ss, gfc_expr * expr, gfc_ref * ref)
                                              1, GFC_SS_VECTOR);
                  indexss->loop_chain = gfc_ss_terminator;
                  newss->data.info.subscript[n] = indexss;
-                 newss->data.info.dim[newss->data.info.dimen] = n;
-                 newss->data.info.dimen++;
+                 newss->dim[newss->dimen] = n;
+                 newss->dimen++;
                  break;
 
                default:
@@ -7701,7 +7777,7 @@ gfc_walk_array_ref (gfc_ss * ss, gfc_expr * expr, gfc_ref * ref)
            }
          /* We should have at least one non-elemental dimension,
             unless we are creating a descriptor for a (scalar) coarray.  */
-         gcc_assert (newss->data.info.dimen > 0
+         gcc_assert (newss->dimen > 0
                      || newss->data.info.ref->u.ar.as->corank > 0);
          ss = newss;
          break;
@@ -7813,7 +7889,7 @@ gfc_walk_elemental_function_args (gfc_ss * ss, gfc_actual_arglist *arg,
          /* Scalar argument.  */
          gcc_assert (type == GFC_SS_SCALAR || type == GFC_SS_REFERENCE);
          newss = gfc_get_scalar_ss (head, arg->expr);
-         newss->type = type;
+         newss->info->type = type;
        }
       else
        scalar = 0;