gcc/testsuite/gcc.dg/tree-ssa/20041008-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" } */
   3
   4 struct A {
   5     int x;
   6     int y;
   7 };
   8
   9 baz (struct A *a)
  10 {
  11   a->x = 3;
  12   a->y = 2;
  13 }
  14
  15 foo (int i)
  16 {
  17   struct A a;
  18
  19   /* Make sure we can't scalarize 'a'.  */
  20   baz (&a);
  21
  22   if (i > 10)
  23     a.x = i;
  24   else
  25     a.x = i;
  26
  27   /* Copy propagation should prove that this predicate is always false.  */
  28   if (a.x != i)
  29     link_error ();
  30
  31   return a.x;
  32 }
  33
  34 main ()
  35 {
  36   foo (30);
  37   return 0;
  38 }