1  /* { dg-do run } */
       2  /* { dg-options "-O1 -floop-nest-optimize" } */
       3  
       4  int xc, n1 = 0;
       5  int bx[2];
       6  
       7  int
       8  main (void)
       9  {
      10    int aj = 1;
      11    int cs;
      12  
      13    for (cs = aj; cs >= 0; --cs)
      14      {
      15        int sq;
      16  
      17        for (sq = 0; sq < 2; ++sq)
      18  	{
      19  	  if (aj != 0)
      20  	    --n1;
      21  
      22  	  for (xc = 0; xc < 2; ++xc)
      23  	    bx[xc] = 0;
      24  	}
      25  
      26        --aj;
      27      }
      28  
      29    if (n1 != -2)
      30      __builtin_abort ();
      31    return 0;
      32  }