1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c
index d9c50bd..b025215 100644
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -3338,6 +3338,10 @@ lang_get_alias_set (t)
       if (t1 != t)
 	return get_alias_set (t1);
     }
+  /* It's not yet safe to use alias sets for classes in C++ because
+     the TYPE_FIELDs list for a class doesn't mention base classes.  */
+  else if (c_language == clk_cplusplus && AGGREGATE_TYPE_P (t));
+    return 0;
 
   return -1;
 }