1  /* { dg-do compile } */
       2  /* { dg-options "-O1 -fdump-tree-optimized" } */
       3  
       4  int f(_Bool x)
       5  {
       6    int y;
       7    if (x != 1)
       8      y = 0;
       9    else
      10      y = 1;
      11    return y;
      12  }
      13  
      14  /* There should be no != 1. Fold changes x != 1 to ! x.  */
      15  /* { dg-final { scan-tree-dump-times "!= 1" 0 "optimized" } } */
      16