gcc/testsuite/gcc.c-torture/execute/pr15262.c

   1 /* We used to mis-compile this testcase as we did not know that
   2    &a+offsetof(b,a) was the same as &a.b */
   3 struct A
   4 {
   5   int t;
   6   int i;
   7 };
   8
   9 void
  10 bar (float *p)
  11 {
  12   *p = 5.2;
  13 }
  14
  15 int
  16 foo(struct A *locp, int i, int str)
  17 {
  18   float f, g, *p;
  19   int T355;
  20   int *T356;
  21   /* Currently, the alias analyzer has limited support for handling
  22      aliases of structure fields when no other variables are aliased.
  23      Introduce additional aliases to confuse it.  */
  24   p =  i ? &g : &f;
  25   bar (p);
  26   if (*p > 0.0)
  27     str = 1;
  28
  29   T355 = locp->i;
  30   T356 = &locp->i;
  31   *T356 = str;
  32   T355 = locp->i;
  33
  34   return T355;
  35 }
  36
  37 main ()
  38 {
  39   struct A loc;
  40   int str;
  41
  42   loc.i = 2;
  43   str = foo (&loc, 10, 3);
  44   if (str!=1)
  45     abort ();
  46   return 0;
  47 }
  48