--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/tree-ssa/fnsplit-2.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,33 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-fnsplit-blocks-details" } */
+void q (void);
+int b;
+void test (void);
+void
+split_me (int *a)
+{
+  if (__builtin_expect (a==0, 0))
+    do
+    {
+      test();
+      test();
+      test();
+      test();
+      test();
+    }
+    while (b);
+  else
+    q();
+}
+
+int
+main(void)
+{
+  int i;
+  for (i = 0; i < 1000; i++)
+    split_me(&i);
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "Splitting function at:" 1 "fnsplit"} } */
+/* { dg-final { scan-tree-dump-times "Invalid sum" 0 "fnsplit"} } */