gcc/testsuite/gcc.c-torture/execute/20041213-2.c

   1 /* PR tree-optimization/18694
   2
   3    The dominator optimization didn't take the PHI evaluation order
   4    into account when threading an edge.  */
   5
   6 extern void abort (void) __attribute__((noreturn));
   7 extern void exit (int) __attribute__((noreturn));
   8
   9 void __attribute__((noinline))
  10 foo (int i)
  11 {
  12   int next_n = 1;
  13   int j = 0;
  14
  15   for (; i != 0; i--)
  16     {
  17       int n;
  18
  19       for (n = next_n; j < n; j++)
  20         next_n++;
  21
  22       if (j != n)
  23         abort ();
  24     }
  25 }
  26
  27 int
  28 main (void)
  29 {
  30   foo (2);
  31   exit (0);
  32 }