1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-optimized" } */
       3  
       4  int f(unsigned a, unsigned b) {
       5    unsigned remove = a - b;
       6    return remove > a;
       7  }
       8  
       9  int g(unsigned a, unsigned b) {
      10    unsigned remove = a - b;
      11    return remove <= a;
      12  }
      13  
      14  int h(unsigned a, unsigned b) {
      15    unsigned remove = a - b;
      16    return a < remove;
      17  }
      18  
      19  int i(unsigned a, unsigned b) {
      20    unsigned remove = a - b;
      21    return a >= remove;
      22  }
      23  
      24  /* { dg-final { scan-tree-dump-not "remove" "optimized" } } */