gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/pr15262-2.c

   1 /* PR 15262.  Similar to pr15262-1.c but with no obvious addresses
   2    being taken in function foo().  Without IPA, by only looking inside
   3    foo() we cannot tell for certain whether 'q' and 'b' alias each
   4    other.  */
   5 struct A
   6 {
   7   int t;
   8   int i;
   9 };
  10
  11 struct B
  12 {
  13   int *p;
  14   float b;
  15 };
  16
  17 float X;
  18
  19 foo (struct B b, struct A *q, float *h)
  20 {
  21   X += *h;
  22   *(b.p) = 3;
  23   q->t = 2;
  24   return *(b.p);
  25 }
  26
  27 main()
  28 {
  29   struct A a;
  30   struct B b;
  31
  32   b.p = &a.t;
  33   if (foo (b, &a, &X) == 3)
  34     abort ();
  35
  36   return 0;
  37 }