1  /* PR tree-optimization/20657
       2     VRP did not pick up a conditional equivalence from the first "if"
       3     statement, which was needed to eliminate the second "if" statement.  */
       4  
       5  /* { dg-do compile } */
       6  /* { dg-options "-O2 -fno-tree-dominator-opts -fno-tree-fre -fdump-tree-evrp" } */
       7  
       8  int
       9  foo (int a)
      10  {
      11    if (a == 0)
      12      if (a == 0)
      13        return 1;
      14    return 0;
      15  }
      16  
      17  /* { dg-final { scan-tree-dump-times "if" 1 "evrp"} } */