New test from Joern.

From-SVN: r17410

gcc/testsuite/gcc.c-torture/execute/strct-stdarg-1.c

+#include <stdarg.h>
+
+struct tiny
+{
+  char c;
+  char d;
+  char e;
+  char f;
+  char g;
+};
+
+f (int n, ...)
+{
+  struct tiny x;
+  int i;
+
+  va_list ap;
+  va_start (ap,n);
+  for (i = 0; i < n; i++)
+    {
+      x = va_arg (ap,struct tiny);
+      if (x.c != i + 10)
+	abort();
+      if (x.d != i + 20)
+	abort();
+      if (x.e != i + 30)
+	abort();
+      if (x.f != i + 40)
+	abort();
+      if (x.g != i + 50)
+	abort();
+    }
+  {
+    long x = va_arg (ap, long);
+    if (x != 123)
+      abort();
+  }
+  va_end (ap);
+}
+
+main ()
+{
+  struct tiny x[3];
+  x[0].c = 10;
+  x[1].c = 11;
+  x[2].c = 12;
+  x[0].d = 20;
+  x[1].d = 21;
+  x[2].d = 22;
+  x[0].e = 30;
+  x[1].e = 31;
+  x[2].e = 32;
+  x[0].f = 40;
+  x[1].f = 41;
+  x[2].f = 42;
+  x[0].g = 50;
+  x[1].g = 51;
+  x[2].g = 52;
+  f (3, x[0], x[1], x[2], (long) 123);
+  exit(0);
+}