diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 009203b51b24..60bc0a9ae3b3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2012-01-27  Richard Guenther  <rguenther@suse.de>
+
+	* ipa-pure-const.c (check_stmt): Clobbers do not make a
+	function non-const/pure.
+
 2012-01-27  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/50444
diff --git a/gcc/ipa-pure-const.c b/gcc/ipa-pure-const.c
index 82e24cf5a015..e8b21f9fc6b6 100644
--- a/gcc/ipa-pure-const.c
+++ b/gcc/ipa-pure-const.c
@@ -652,7 +652,8 @@ check_stmt (gimple_stmt_iterator *gsip, funct_state local, bool ipa)
       print_gimple_stmt (dump_file, stmt, 0, 0);
     }
 
-  if (gimple_has_volatile_ops (stmt))
+  if (gimple_has_volatile_ops (stmt)
+      && !gimple_clobber_p (stmt))
     {
       local->pure_const_state = IPA_NEITHER;
       if (dump_file)