From: Jeff Law <law@gcc.gnu.org>
Date: Thu, 16 Apr 1998 16:48:43 +0000 (-0600)
Subject: search.c (my_tree_cons): Don't clear words outside the newly allocated node.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=936f0e02314b40197b8a0bf310060cddc4e21e19;p=gcc.git

search.c (my_tree_cons): Don't clear words outside the newly allocated node.

8
        * search.c (my_tree_cons): Don't clear words outside the
        newly allocated node.

From-SVN: r19238
---

diff --git a/gcc/cp/search.c b/gcc/cp/search.c
index 488220adc2a..4438372d79c 100644
--- a/gcc/cp/search.c
+++ b/gcc/cp/search.c
@@ -260,7 +260,10 @@ my_tree_cons (purpose, value, chain)
   tree p = (tree)obstack_alloc (&type_obstack_entries, sizeof (struct tree_list));
   ++my_tree_node_counter;
   TREE_TYPE (p) = NULL_TREE;
-  ((HOST_WIDE_INT *)p)[3] = 0;
+  /* The type of the last on the LHS of this statement must be a pointer
+     to the same type as the bitfields in struct tree_common.  Otherwise
+     we may write beyond our intended area.  */
+  ((unsigned *)p)[3] = 0;
   TREE_SET_CODE (p, TREE_LIST);
   TREE_PURPOSE (p) = purpose;
   TREE_VALUE (p) = value;