1  /* { dg-do compile } */
       2  /* { dg-options "-fdump-tree-original" } */
       3  
       4  int test1 (int a)
       5  {
       6    return 2 - a == a;
       7  }
       8  int test2 (int a)
       9  {
      10    return 1 - a == a;
      11  }
      12  int test3 (int a)
      13  {
      14    return 1 - a != a;
      15  }
      16  
      17  /* { dg-final { scan-tree-dump-times "return 2 - a == a" 1 "original" } } */
      18  /* { dg-final { scan-tree-dump-times "return 0" 1 "original" } } */
      19  /* { dg-final { scan-tree-dump-times "return 1" 1 "original" } } */