1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-fre1" } */
       3  
       4  extern void abort (void);
       5  
       6  int a;
       7  
       8  int
       9  main(void)
      10  {
      11    if (a * 1000 < 0)
      12      abort ();
      13    if (a * -43 > 0)
      14      abort ();
      15    return 0;
      16  }
      17  
      18  /* { dg-final { scan-tree-dump-times "Removing basic block" 2 "fre1" } } */
      19