re PR fortran/40005 (segfault in gt_ggc_mx_lang_tree_node)

2009-07-25  Richard Guenther  <rguenther@suse.de>

	PR fortran/40005
	* trans-types.c (gfc_get_array_type_bounds): Use
	build_distinct_type_copy with a proper TYPE_CANONICAL and
	re-use the type-decl of the original type.
	* trans-decl.c (build_entry_thunks): Signal cgraph we may not
	garbage collect.
	(create_main_function): Likewise.
	(gfc_generate_function_code): Likewise.
	* trans-expr.c (gfc_trans_subcomponent_assign): Do not use
	fold_convert on record types.

From-SVN: r150079

gcc/fortran/ChangeLog

+2009-07-25  Richard Guenther  <rguenther@suse.de>
+
+	PR fortran/40005
+	* trans-types.c (gfc_get_array_type_bounds): Use
+	build_distinct_type_copy with a proper TYPE_CANONICAL and
+	re-use the type-decl of the original type.
+	* trans-decl.c (build_entry_thunks): Signal cgraph we may not
+	garbage collect.
+	(create_main_function): Likewise.
+	(gfc_generate_function_code): Likewise.
+	* trans-expr.c (gfc_trans_subcomponent_assign): Do not use
+	fold_convert on record types.
+
 2009-07-25  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/39630

gcc/fortran/trans-decl.c

@@ -2032,7 +2032,7 @@ build_entry_thunks (gfc_namespace * ns)
 
       current_function_decl = NULL_TREE;
 
-      cgraph_finalize_function (thunk_fndecl, false);
+      cgraph_finalize_function (thunk_fndecl, true);
 
       /* We share the symbols in the formal argument list with other entry
 	 points and the master function.  Clear them so that they are
@@ -4114,7 +4114,7 @@ create_main_function (tree fndecl)
   /* Output the GENERIC tree.  */
   dump_function (TDI_original, ftn_main);
 
-  cgraph_finalize_function (ftn_main, false);
+  cgraph_finalize_function (ftn_main, true);
 
   if (old_context)
     {
@@ -4385,7 +4385,7 @@ gfc_generate_function_code (gfc_namespace * ns)
        added to our parent's nested function list.  */
     (void) cgraph_node (fndecl);
   else
-    cgraph_finalize_function (fndecl, false);
+    cgraph_finalize_function (fndecl, true);
 
   gfc_trans_use_stmts (ns);
   gfc_traverse_ns (ns, gfc_emit_parameter_debug_info);

gcc/fortran/trans-expr.c

@@ -3763,9 +3763,7 @@ gfc_trans_subcomponent_assign (tree dest, gfc_component * cm, gfc_expr * expr)
 	  se.want_pointer = 0;
 	  gfc_conv_expr_descriptor (&se, expr, rss);
 	  gfc_add_block_to_block (&block, &se.pre);
-
-	  tmp = fold_convert (TREE_TYPE (dest), se.expr);
-	  gfc_add_modify (&block, dest, tmp);
+	  gfc_add_modify (&block, dest, se.expr);
 
 	  if (cm->ts.type == BT_DERIVED && cm->ts.derived->attr.alloc_comp)
 	    tmp = gfc_copy_alloc_comp (cm->ts.derived, se.expr, dest,

gcc/fortran/trans-types.c

@@ -1602,7 +1602,9 @@ gfc_get_array_type_bounds (tree etype, int dimen, tree * lbound,
   int n;
 
   base_type = gfc_get_array_descriptor_base (dimen);
-  fat_type = build_variant_type_copy (base_type);
+  fat_type = build_distinct_type_copy (base_type);
+  TYPE_CANONICAL (fat_type) = base_type;
+  TYPE_STUB_DECL (fat_type) = TYPE_STUB_DECL (base_type);
 
   tmp = TYPE_NAME (etype);
   if (tmp && TREE_CODE (tmp) == TYPE_DECL)