--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr45652.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,39 @@
+/* { dg-do run { target powerpc*-*-* ia64-*-* i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -fselective-scheduling2" } */
+
+struct S {
+  double i[2];
+};
+
+void __attribute__ ((noinline)) checkcd (struct S x)
+{
+  if (x.i[0] != 7.0 || x.i[1] != 8.0)
+    __builtin_abort ();
+}
+
+void __attribute__ ((noinline)) testvacd (int n, ...)
+{
+  int i;
+  __builtin_va_list ap;
+  __builtin_va_start (ap, n);
+  for (i = 0; i < n; i++)
+    {
+      struct S t = __builtin_va_arg (ap, struct S);
+      checkcd (t);
+    }
+  __builtin_va_end (ap);
+}
+
+void
+testitcd (void)
+{
+  struct S x = { { 7.0, 8.0 } };
+  testvacd (2, x, x);
+}
+
+int
+main ()
+{
+  testitcd ();
+  return 0;
+}