gcc/testsuite/gcc.dg/20030309-1.c

   1 /* { dg-do link } */
   2 /* { dg-options "-O2" } */
   3
   4 struct A0 { int x; };
   5 struct A1 { int x; int y[1]; };
   6 struct A2 { int x; int y[2]; };
   7 struct A3 { int x; int y[3]; };
   8 struct A4 { int x; int y[4]; };
   9
  10 void *s;
  11 int u;
  12
  13 int
  14 main (void)
  15 {
  16   int x;
  17   void *t = s;
  18
  19   switch (u)
  20     {
  21     case 0:
  22       x = ((struct A0 *) t)->x;
  23       break;
  24     case 1:
  25       x = ((struct A1 *) t)->x;
  26       break;
  27     case 2:
  28       x = ((struct A2 *) t)->x;
  29       break;
  30     case 3:
  31       x = ((struct A3 *) t)->x;
  32       break;
  33     case 4:
  34       x = ((struct A4 *) t)->x;
  35       break;
  36     default:
  37       x = 0;
  38       break;
  39     }
  40
  41   return x;
  42 }