--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/hoist-register-pressure-2.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,36 @@
+/* { dg-options "-Os -fdump-rtl-hoist -fno-code-hoisting" }  */
+/* The rtl hoist pass requires that the expression to be hoisted can
+   be assigned without clobbering cc.  For a PLUS rtx on S/390 this
+   requires a load address instruction which is fine on 64 bit but
+   cannot be used on 31 bit since it does a 31 bit add only.  */
+/* { dg-final { scan-rtl-dump "PRE/HOIST: end of bb .* copying expression" "hoist" { target { !s390*-*-* || lp64 } } } } */
+
+#define BUF 100
+long a[BUF];
+
+void com (long);
+void bar (long);
+
+long foo (long x, long y, long z)
+{
+  /* "x+y" won't be hoisted if "-fira-hoist-pressure" is disabled,
+     because its rtx_cost is too small.  */
+  if (z)
+    {
+      a[1] = a[0];
+      a[2] = a[1];
+      a[3] = a[3];
+      a[4] = a[5];
+      a[5] = a[7];
+      a[6] = a[11];
+      a[7] = a[13];
+      a[8] = a[17];
+      com (x+y);
+    }
+  else
+    {
+      bar (x+y);
+    }
+
+  return 0;
+}