[PATCH] Do not walk BINFOs in record_component_aliases

[Richard Biener]

As discussed last year.

Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.

Richard.

2014-04-15  Richard Biener  <rguent...@suse.de>

        * alias.c (record_component_aliases): Do not walk BINFOs.

Index: gcc/alias.c
===================================================================
--- gcc/alias.c (revision 209405)
+++ gcc/alias.c (working copy)
@@ -995,17 +995,6 @@ record_component_aliases (tree type)
     case RECORD_TYPE:
     case UNION_TYPE:
     case QUAL_UNION_TYPE:
-      /* Recursively record aliases for the base classes, if there are any.  */
-      if (TYPE_BINFO (type))
-       {
-         int i;
-         tree binfo, base_binfo;
-
-         for (binfo = TYPE_BINFO (type), i = 0;
-              BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
-           record_alias_subset (superset,
-                                get_alias_set (BINFO_TYPE (base_binfo)));
-       }
       for (field = TYPE_FIELDS (type); field != 0; field = DECL_CHAIN (field))
        if (TREE_CODE (field) == FIELD_DECL && !DECL_NONADDRESSABLE_P (field))
          record_alias_subset (superset, get_alias_set (TREE_TYPE (field)));