1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fno-thread-jumps -fdisable-tree-evrp -fdump-tree-vrp1 -fdump-tree-dce2 -fdelete-null-pointer-checks" } */
       3  
       4  int
       5  foo (int *p)
       6  {
       7    int a = *p;
       8    int b = p != 0;
       9  
      10    *p = b;
      11  
      12    if (b)
      13      return a;
      14    else
      15      return 0;
      16  }
      17  
      18  /* Target disabling -fdelete-null-pointer-checks should not fold checks */
      19  /* { dg-final { scan-tree-dump "Folding predicate " "vrp1" { target { ! keeps_null_pointer_checks } } } } */
      20  /* { dg-final { scan-tree-dump-times "Folding predicate " 0 "vrp1" { target {   keeps_null_pointer_checks } } } } */