--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr84875.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,28 @@
+/* PR debug/84875 */
+/* { dg-do compile } */
+/* { dg-options "-Os" } */
+/* { dg-additional-options "-fpie" { target pie } } */
+/* { dg-additional-options "-march=z196" { target s390*-*-* } } */
+
+static long *a[100];
+static int b[100];
+long *c;
+int d;
+void foo (long *);
+
+void
+bar ()
+{
+  long *g = c;
+  g--;
+  d = *g;
+  if (d)
+    if (b[d] < 8)
+      {
+	*(void **)g = a[d];
+	a[d] = g;
+	b[d]++;
+	return;
+      }
+  foo (g);
+}