--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/unroll-3.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,31 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-cunrolli-details -fno-peel-loops -fno-tree-vrp -fdisable-tree-cunrolli=foo -fenable-tree-cunrolli=foo" } */
+
+unsigned a[100], b[100];
+inline void bar()
+{
+ a[10] = b[10];
+}
+
+int foo(void)
+{
+  int i;
+  bar();
+  for (i = 0; i < 2; i++)
+  {
+     a[i]= b[i] + 1;
+  }
+  return 1;
+}
+
+int foo2(void)
+{
+  int i;
+  for (i = 0; i < 2; i++)
+  {
+     a[i]= b[i] + 1;
+  }
+  return 1;
+}
+
+/* { dg-final { scan-tree-dump-times "loop with 3 iterations completely unrolled" 1 "cunrolli" } } */