--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/torture/pr87665.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,27 @@
+/* { dg-do run } */
+
+struct X { long x; long y; };
+
+struct X a[1024], b[1024];
+
+void foo ()
+{
+  for (int i = 0; i < 1024; ++i)
+    {
+      long tem = a[i].x;
+      a[i].x = 0;
+      b[i].x = tem;
+      b[i].y = a[i].y;
+    }
+}
+
+int main()
+{
+  for (int i = 0; i < 1024; ++i)
+    a[i].x = i;
+  foo ();
+  for (int i = 0; i < 1024; ++i)
+    if (b[i].x != i)
+      __builtin_abort();
+  return 0;
+}