--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/rotate-9.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,19 @@
+/* PR tree-optimization/86401 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-ipa-icf -fdump-tree-optimized" } */
+/* { dg-final { scan-tree-dump-times "r\[<>]\[<>]" 2 "optimized" } } */
+
+unsigned int
+f1 (unsigned int x, unsigned int s)
+{
+  unsigned int t = s % (__CHAR_BIT__ * __SIZEOF_INT__);
+  return (x << t) | (x >> (((__CHAR_BIT__ * __SIZEOF_INT__) - t) % (__CHAR_BIT__ * __SIZEOF_INT__)));
+}
+
+unsigned int
+f2 (unsigned int x, unsigned int s)
+{
+  int n = __CHAR_BIT__ * __SIZEOF_INT__;
+  unsigned int t = s % n;
+  return (x << t) | (x >> ((n - t) % n));
+}