1  /* { dg-do compile } */
       2  /* { dg-options "-fdump-tree-original" } */
       3  
       4  int test1 (int a, int b)
       5  {
       6    return a - b == a;
       7  }
       8  int test2 (int a, int b)
       9  {
      10    return a + b == a;
      11  }
      12  int test3 (int a)
      13  {
      14    return a + 5 == a;
      15  }
      16  int test4 (int a)
      17  {
      18    return a - 5 == a;
      19  }
      20  
      21  /* { dg-final { scan-tree-dump-times "b == 0" 2 "original" } } */
      22  /* { dg-final { scan-tree-dump-times "return 0" 2 "original" } } */