gcc/testsuite/gcc.dg/20041104-1.c

   1 /* This testcase exposed the same bug as PR 15342.  */
   2 /* { dg-options "-O2 -frename-registers -fno-schedule-insns" } */
   3
   4 void *memcpy (void *, const void *, __SIZE_TYPE__);
   5
   6 void f (int n, int (*x)[4])
   7 {
   8   while (n--)
   9     {
  10       int f = x[0][0];
  11       if (f <= 0)
  12         memcpy (&x[1], &x[0], sizeof (x[0]));
  13       else
  14         memcpy (&x[f], &x[0], sizeof (x[0]));
  15       f = x[0][2];
  16       x[0][1] = f;
  17     }
  18 }