diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9161ce4b3b7b..0cb80827e3e2 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-08-24  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/66821
+	* gcc.target/i386/pr66821.c: New test.
+
 2015-08-24  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/67329
diff --git a/gcc/testsuite/gcc.target/i386/pr66821.c b/gcc/testsuite/gcc.target/i386/pr66821.c
new file mode 100644
index 000000000000..d32f03d5a964
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr66821.c
@@ -0,0 +1,15 @@
+/* { dg-do compile { target ia32 } } */
+/* { dg-options "-O2 -fdump-tree-optimized -mtune=iamcu" } */
+
+void bar (void);
+
+void
+foo (int x)
+{
+  if (x != 2 && x != 3 && x != 10 && x != 11 && x != 17 && x != 18 && x != 23)
+    bar ();
+}
+
+/* Check if the tests have been folded into a bit test.  */
+/* { dg-final { scan-tree-dump "(8784908|0x0*860c0c)" "optimized" } } */
+/* { dg-final { scan-tree-dump "(<<|>>)" "optimized" } } */