tree.c (free_lang_data_in_type): If BINFO has no important information in it, set it to NULL.

	* tree.c (free_lang_data_in_type): If BINFO has no important
	information in it, set it to NULL.
	(get_binfo_at_offset): Do not walk fields, only bases.
	* ipa-utils.h (polymorphic_type_binfo_p): Be ready for BINFO_TYPE
	to be NULL.
	* ipa-polymorphic-call.c (record_known_type): Likewise.

From-SVN: r217824

gcc/ChangeLog

+2014-11-19  Jan Hubicka  <hubicka@ucw.cz>
+
+	* tree.c (free_lang_data_in_type): If BINFO has no important
+	information in it, set it to NULL.
+	(get_binfo_at_offset): Do not walk fields, only bases.
+	* ipa-utils.h (polymorphic_type_binfo_p): Be ready for BINFO_TYPE
+	to be NULL.
+	* ipa-polymorphic-call.c (record_known_type): Likewise.
+
 2014-11-19  David Malcolm  <dmalcolm@redhat.com>
 
 	PR jit/63854

gcc/ipa-devirt.c

@@ -1849,7 +1849,7 @@ possible_polymorphic_call_targets_1 (vec <cgraph_node *> &nodes,
 {
   tree binfo = TYPE_BINFO (type->type);
   unsigned int i;
-  vec <tree> type_binfos = vNULL;
+  auto_vec <tree, 8> type_binfos;
   bool possibly_instantiated = type_possibly_instantiated_p (type->type);
 
   /* We may need to consider types w/o instances because of possible derived
@@ -1868,7 +1868,6 @@ possible_polymorphic_call_targets_1 (vec <cgraph_node *> &nodes,
 				inserted, matched_vtables,
 				type->anonymous_namespace, completep);
     }
-  type_binfos.release ();
   for (i = 0; i < type->derived_types.length (); i++)
     possible_polymorphic_call_targets_1 (nodes, inserted, 
 					 matched_vtables,
@@ -2226,7 +2225,7 @@ possible_polymorphic_call_targets (tree otr_type,
 {
   static struct cgraph_node_hook_list *node_removal_hook_holder;
   vec <cgraph_node *> nodes = vNULL;
-  vec <tree> bases_to_consider = vNULL;
+  auto_vec <tree, 8> bases_to_consider;
   odr_type type, outer_type;
   polymorphic_call_target_d key;
   polymorphic_call_target_d **slot;
@@ -2521,7 +2520,6 @@ possible_polymorphic_call_targets (tree otr_type,
 	}
     }
 
-  bases_to_consider.release();
   (*slot)->targets = nodes;
   (*slot)->complete = complete;
   if (completep)

gcc/ipa-polymorphic-call.c

@@ -1307,6 +1307,7 @@ record_known_type (struct type_change_info *tci, tree type, HOST_WIDE_INT offset
   if (type
       && (offset
           || (TREE_CODE (type) != RECORD_TYPE
+	      || !TYPE_BINFO (type)
 	      || !polymorphic_type_binfo_p (TYPE_BINFO (type)))))
     {
       ipa_polymorphic_call_context context;

gcc/ipa-utils.h

@@ -183,7 +183,8 @@ polymorphic_type_binfo_p (const_tree binfo)
   /* See if BINFO's type has an virtual table associtated with it.
      Check is defensive because of Java FE produces BINFOs
      without BINFO_TYPE set.   */
-  return BINFO_TYPE (binfo) && BINFO_VTABLE (TYPE_BINFO (BINFO_TYPE (binfo)));
+  return (BINFO_TYPE (binfo) && TYPE_BINFO (BINFO_TYPE (binfo))
+	  && BINFO_VTABLE (TYPE_BINFO (BINFO_TYPE (binfo))));
 }
 #endif  /* GCC_IPA_UTILS_H  */
 

gcc/tree.c

@@ -4976,7 +4976,14 @@ free_lang_data_in_type (tree type)
 
       TYPE_METHODS (type) = NULL_TREE;
       if (TYPE_BINFO (type))
-	free_lang_data_in_binfo (TYPE_BINFO (type));
+	{
+	  free_lang_data_in_binfo (TYPE_BINFO (type));
+	  if ((!BINFO_VTABLE (TYPE_BINFO (type))
+	       || !flag_devirtualize)
+	      && (!BINFO_N_BASE_BINFOS (TYPE_BINFO (type))
+		  || debug_info_level != DINFO_LEVEL_NONE))
+	    TYPE_BINFO (type) = NULL;
+	}
     }
   else
     {
@@ -11926,7 +11933,7 @@ get_binfo_at_offset (tree binfo, HOST_WIDE_INT offset, tree expected_type)
 
       for (fld = TYPE_FIELDS (type); fld; fld = DECL_CHAIN (fld))
 	{
-	  if (TREE_CODE (fld) != FIELD_DECL)
+	  if (TREE_CODE (fld) != FIELD_DECL || !DECL_ARTIFICIAL (fld))
 	    continue;
 
 	  pos = int_bit_position (fld);
@@ -11937,12 +11944,6 @@ get_binfo_at_offset (tree binfo, HOST_WIDE_INT offset, tree expected_type)
       if (!fld || TREE_CODE (TREE_TYPE (fld)) != RECORD_TYPE)
 	return NULL_TREE;
 
-      if (!DECL_ARTIFICIAL (fld))
-	{
-	  binfo = TYPE_BINFO (TREE_TYPE (fld));
-	  if (!binfo)
-	    return NULL_TREE;
-	}
       /* Offset 0 indicates the primary base, whose vtable contents are
 	 represented in the binfo for the derived class.  */
       else if (offset != 0)
@@ -11967,6 +11968,7 @@ get_binfo_at_offset (tree binfo, HOST_WIDE_INT offset, tree expected_type)
 		      * BITS_PER_UNIT < pos
 		      /* Rule out types with no virtual methods or we can get confused
 			 here by zero sized bases.  */
+		      && TYPE_BINFO (BINFO_TYPE (base_binfo))
 		      && BINFO_VTABLE (TYPE_BINFO (BINFO_TYPE (base_binfo)))
 		      && (!containing_binfo
 			  || (tree_to_shwi (BINFO_OFFSET (containing_binfo))