diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 117fbb779b6..8d26a00c153 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2004-11-09  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* tree-cfg.c (create_bb): Remove unnecessary memset.
+
 2004-11-09  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* tree-ssa-threadupdate.c (copy_phis_to_block): Remove.
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 8da78c8ff0d..8c1a06f621c 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -375,9 +375,10 @@ create_bb (void *h, void *e, basic_block after)
 
   gcc_assert (!e);
 
-  /* Create and initialize a new basic block.  */
+  /* Create and initialize a new basic block.  Since alloc_block uses
+     ggc_alloc_cleared to allocate a basic block, we do not have to
+     clear the newly allocated basic block here.  */
   bb = alloc_block ();
-  memset (bb, 0, sizeof (*bb));
 
   bb->index = last_basic_block;
   bb->flags = BB_NEW;