--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr87287.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,34 @@
+/* PR tree-optimization/87287 */
+/* { dg-options "-O2 -fdump-tree-cddce1" } */
+/* { dg-final { scan-tree-dump-not " % 16" "cddce1" } } */
+/* { dg-final { scan-tree-dump-times " & 15" 4 "cddce1" } } */
+
+void f0 (void);
+
+int
+f1 (int x)
+{
+  return x % 16 == 0;
+}
+
+int
+f2 (int x)
+{
+  int y = x % 16;
+  return y != 0;
+}
+
+void
+f3 (int x)
+{
+  if (x % 16 != 0)
+    f0 ();
+}
+
+void
+f4 (int x)
+{
+  int y = x % 16;
+  if (y == 0)
+    f0 ();
+}