diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 17c9a4b5128..e72f321b6c3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2010-01-15  Richard Guenther  <rguenther@suse.de>
+
+	* tree-ssa-loop-im.c (gen_lsm_tmp_name): Fix bogus fallthru.
+
 2010-01-14  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	PR target/42747
diff --git a/gcc/tree-ssa-loop-im.c b/gcc/tree-ssa-loop-im.c
index 1cc56595a9d..528db650570 100644
--- a/gcc/tree-ssa-loop-im.c
+++ b/gcc/tree-ssa-loop-im.c
@@ -1776,8 +1776,8 @@ gen_lsm_tmp_name (tree ref)
       name = get_name (TREE_OPERAND (ref, 1));
       if (!name)
 	name = "F";
-      lsm_tmp_name_add ("_");
       lsm_tmp_name_add (name);
+      break;
 
     case ARRAY_REF:
       gen_lsm_tmp_name (TREE_OPERAND (ref, 0));