1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-original" } */
       3  int test1(int a)
       4  {
       5    return !(a & 1);
       6  }
       7  
       8  int test2(int b)
       9  {
      10    return (b & 1) == 0;
      11  }
      12  
      13  int test3(int c)
      14  {
      15    return (c & 1) ^ 1;
      16  }
      17  
      18  int test4(int d)
      19  {
      20    return (d ^ 1) & 1;
      21  }
      22  
      23  int test5(int e)
      24  {
      25    return ~e & 1;
      26  }
      27  
      28  /* { dg-final { scan-tree-dump-times "\\(a \& 1\\) == 0" 1 "original" } } */
      29  /* { dg-final { scan-tree-dump-times "\\(b \& 1\\) == 0" 1 "original" } } */
      30  /* { dg-final { scan-tree-dump-times "\\(c \& 1\\) == 0" 1 "original" } } */
      31  /* { dg-final { scan-tree-dump-times "\\(d \& 1\\) == 0" 1 "original" } } */
      32  /* { dg-final { scan-tree-dump-times "\\(e \& 1\\) == 0" 1 "original" } } */