Complete information generated through the array descriptor language hook

gcc/
	* dwarf2out.h (enum array_descr_ordering): New.
	(array_descr_dimen): Add a bounds_type structure field.
	(struct array_descr_info): Add a field to hold index type information
	and another one to hold ordering information.
	* dwarf2out.c (gen_type_die_with_usage): Get the main variant before
	invoking the array descriptor language hook.  Initialize the
	array_descr_info structure before calling the lang-hook.
	(gen_descr_array_type_die): Use gen_type_die if not processing the main
	type variant.  Replace Fortran-specific code with generic one using
	this new field.  Add a GNAT descriptive type, if any.  Output type
	information for the array bound subrange, if any.

gcc/fortran
	* trans-types.c (gfc_get_array_descr_info): Describe all Fortran arrays
	with column major ordering.

From-SVN: r218823

gcc/ChangeLog

+2014-12-17  Pierre-Marie de Rodat  <derodat@adacore.com>
+
+	* dwarf2out.h (enum array_descr_ordering): New.
+	(array_descr_dimen): Add a bounds_type structure field.
+	(struct array_descr_info): Add a field to hold index type information
+	and another one to hold ordering information.
+	* dwarf2out.c (gen_type_die_with_usage): Get the main variant before
+	invoking the array descriptor language hook.  Initialize the
+	array_descr_info structure before calling the lang-hook.
+	(gen_descr_array_type_die): Use gen_type_die if not processing the main
+	type variant.  Replace Fortran-specific code with generic one using
+	this new field.  Add a GNAT descriptive type, if any.  Output type
+	information for the array bound subrange, if any.
+
 2014-12-17  H.J. Lu  <hongjiu.lu@intel.com>
 	    Jakub Jelinek  <jakub@redhat.com>
 	    Uros Bizjak  <ubizjak@gmail.com>

gcc/dwarf2out.c

@@ -17460,18 +17460,25 @@ static void
 gen_descr_array_type_die (tree type, struct array_descr_info *info,
 			  dw_die_ref context_die)
 {
-  dw_die_ref scope_die = scope_die_for (type, context_die);
-  dw_die_ref array_die;
+  const dw_die_ref scope_die = scope_die_for (type, context_die);
+  const dw_die_ref array_die = new_die (DW_TAG_array_type, scope_die, type);
   int dim;
 
-  array_die = new_die (DW_TAG_array_type, scope_die, type);
   add_name_attribute (array_die, type_tag (type));
   equate_type_number_to_die (type, array_die);
 
-  /* For Fortran multidimensional arrays use DW_ORD_col_major ordering.  */
-  if (is_fortran ()
-      && info->ndimensions >= 2)
+  if (info->ndimensions > 1)
+    switch (info->ordering)
+      {
+      case array_descr_ordering_row_major:
+	add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
+	break;
+      case array_descr_ordering_column_major:
 	add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_col_major);
+	break;
+      default:
+	break;
+      }
 
   if (info->data_location)
     add_descr_info_field (array_die, DW_AT_data_location, info->data_location,
@@ -17483,11 +17490,17 @@ gen_descr_array_type_die (tree type, struct array_descr_info *info,
     add_descr_info_field (array_die, DW_AT_allocated, info->allocated,
 			  info->base_decl);
 
+  add_gnat_descriptive_type_attribute (array_die, type, context_die);
+
   for (dim = 0; dim < info->ndimensions; dim++)
     {
       dw_die_ref subrange_die
 	= new_die (DW_TAG_subrange_type, array_die, NULL);
 
+      if (info->dimen[dim].bounds_type)
+	add_type_attribute (subrange_die,
+			    info->dimen[dim].bounds_type, 0,
+			    context_die);
       if (info->dimen[dim].lower_bound)
 	{
 	  /* If it is the default value, omit it.  */
@@ -20097,24 +20110,27 @@ gen_type_die_with_usage (tree type, dw_die_ref context_die,
       return;
     }
 
+  /* We are going to output a DIE to represent the unqualified version
+     of this type (i.e. without any const or volatile qualifiers) so
+     get the main variant (i.e. the unqualified version) of this type
+     now.  (Vectors are special because the debugging info is in the
+     cloned type itself).  */
+  if (TREE_CODE (type) != VECTOR_TYPE)
+    type = type_main_variant (type);
+
   /* If this is an array type with hidden descriptor, handle it first.  */
   if (!TREE_ASM_WRITTEN (type)
       && lang_hooks.types.get_array_descr_info
-      && lang_hooks.types.get_array_descr_info (type, &info)
       && (dwarf_version >= 3 || !dwarf_strict))
     {
+      memset (&info, 0, sizeof (info));
+      if (lang_hooks.types.get_array_descr_info (type, &info))
+	{
 	  gen_descr_array_type_die (type, &info, context_die);
 	  TREE_ASM_WRITTEN (type) = 1;
 	  return;
 	}
-
-  /* We are going to output a DIE to represent the unqualified version
-     of this type (i.e. without any const or volatile qualifiers) so
-     get the main variant (i.e. the unqualified version) of this type
-     now.  (Vectors are special because the debugging info is in the
-     cloned type itself).  */
-  if (TREE_CODE (type) != VECTOR_TYPE)
-    type = type_main_variant (type);
+    }
 
   if (TREE_ASM_WRITTEN (type))
     return;

gcc/dwarf2out.h

@@ -261,9 +261,17 @@ extern void dwarf2out_set_demangle_name_func (const char *(*) (const char *));
 extern void dwarf2out_vms_debug_main_pointer (void);
 #endif
 
+enum array_descr_ordering
+{
+  array_descr_ordering_default,
+  array_descr_ordering_row_major,
+  array_descr_ordering_column_major
+};
+
 struct array_descr_info
 {
   int ndimensions;
+  enum array_descr_ordering ordering;
   tree element_type;
   tree base_decl;
   tree data_location;
@@ -271,6 +279,10 @@ struct array_descr_info
   tree associated;
   struct array_descr_dimen
     {
+      /* GCC uses sizetype for array indices, so lower_bound and upper_bound
+	 will likely be "sizetype" values. However, bounds may have another
+	 type in the original source code.  */
+      tree bounds_type;
       tree lower_bound;
       tree upper_bound;
       tree stride;

gcc/fortran/ChangeLog

+2014-12-17  Pierre-Marie de Rodat  <derodat@adacore.com>
+
+	* trans-types.c (gfc_get_array_descr_info): Describe all Fortran arrays
+	with column major ordering.
+
 2014-12-17  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/54687

gcc/fortran/trans-types.c

@@ -3044,6 +3044,7 @@ gfc_get_array_descr_info (const_tree type, struct array_descr_info *info)
 
   memset (info, '\0', sizeof (*info));
   info->ndimensions = rank;
+  info->ordering = array_descr_ordering_column_major;
   info->element_type = etype;
   ptype = build_pointer_type (gfc_array_index_type);
   base_decl = GFC_TYPE_ARRAY_BASE_DECL (type, indirect);