1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-dse1-details -fno-short-enums -fno-tree-fre" } */
       3  /* { dg-skip-if "we want a BIT_FIELD_REF from fold_truth_andor" { ! lp64 } } */
       4  /* { dg-skip-if "temporary variable names are not x and y" { mmix-knuth-mmixware } } */
       5  
       6  enum constraint_expr_type
       7  {
       8    SCALAR, DEREF, ADDRESSOF
       9  };
      10  typedef struct constraint_expr
      11  {
      12    enum constraint_expr_type type;
      13    unsigned int var;
      14    long offset;
      15  } constraint_expr ;
      16  typedef struct constraint
      17  {
      18    struct constraint_expr lhs;
      19    struct constraint_expr rhs;
      20  } constraint;
      21  static _Bool
      22  constraint_expr_equal (struct constraint_expr x, struct constraint_expr y)
      23  {
      24    return x.type == y.type && x.var == y.var && x.offset == y.offset;
      25  }
      26  
      27  _Bool
      28  constraint_equal (struct constraint a, struct constraint b)
      29  {
      30    return constraint_expr_equal (a.lhs, b.lhs)
      31      && constraint_expr_equal (a.rhs, b.rhs);
      32  }
      33  
      34  /* { dg-final { scan-tree-dump-times "Deleted dead store: x = " 1 "dse1" } } */
      35  /* { dg-final { scan-tree-dump-times "Deleted dead store: y = " 1 "dse1" } } */