1  /* PR rtl-optimization/20290  */
       2     
       3  /* We used to mis-optimize the second loop in main on at least ppc and
       4     arm, because tree loop would change the loop to something like:
       5  
       6    ivtmp.65 = &l[i];
       7    ivtmp.16 = 113;
       8    goto <bb 4> (<L4>);
       9  
      10  <L3>:;
      11    *(ivtmp.65 + 4294967292B) = 9;
      12    i = i + 1;
      13  
      14  <L4>:;
      15    ivtmp.16 = ivtmp.16 - 1;
      16    ivtmp.65 = ivtmp.65 + 4B;
      17    if (ivtmp.16 != 0) goto <L3>; 
      18  
      19    We used to consider the increment of i as executed in every
      20    iteration, so we'd miscompute the final value.  */
      21  
      22  extern void abort (void);
      23  
      24  void
      25  check (unsigned int *l)
      26  {
      27    int i;
      28    for (i = 0; i < 288; i++)
      29      if (l[i] != 7 + (i < 256 || i >= 280) + (i >= 144 && i < 256))
      30        abort ();
      31  }
      32  
      33  int
      34  main (void)
      35  {
      36    int i;
      37    unsigned int l[288];
      38  
      39    for (i = 0; i < 144; i++)
      40      l[i] = 8;
      41    for (; i < 256; i++)
      42      l[i] = 9;
      43    for (; i < 280; i++)
      44      l[i] = 7;
      45    for (; i < 288; i++)
      46      l[i] = 8;
      47    check (l);
      48    return 0;
      49  }
      50