1  /* PR tree-optimization/96392 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O -fdump-tree-optimized" } */
       4  
       5  double plus0(int x)
       6  {
       7    return x + 0.0;
       8  }
       9  
      10  double sub0(int x)
      11  {
      12    return x - 0.0;
      13  }
      14  
      15  double negate(int x)
      16  {
      17    return 0.0 - x;
      18  }
      19  
      20  double subtract(int x)
      21  {
      22    return (double)x - (double)x;
      23  }
      24  
      25  /* { dg-final { scan-tree-dump-not " \\+ " "optimized" } } */
      26  /* { dg-final { scan-tree-dump-not " \\- " "optimized" } } */
      27