diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 124b3cb38c38..dfe7de21ae0c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2010-08-18  Paolo Bonzini  <bonzini@gnu.org>
+
+	PR middle-end/45292
+	* optabs.c (expand_bool_compare_and_swap): Expand pending
+	pops before trying the optab.
+
 2010-08-18  Yao Qi  <yao@codesourcery.com>
 
 	PR target/45094
diff --git a/gcc/optabs.c b/gcc/optabs.c
index 1fcbedc0089e..5d095c1a9b99 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -6908,6 +6908,7 @@ expand_bool_compare_and_swap (rtx mem, rtx old_val, rtx new_val, rtx target)
   if (icode == CODE_FOR_nothing)
     return NULL_RTX;
 
+  do_pending_stack_adjust ();
   do
     {
       start_sequence ();