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/* { dg-do compile } */

/* { dg-options "-O1 -fdump-tree-dom2" } */

union tree_node;

typedef union tree_node *tree;

extern const char tree_code_type[];

struct tree_common

{

  int code;

  tree type;

};

struct tree_exp

{

  tree operands[1];

};

union tree_node

{

  struct tree_common common;

  struct tree_exp exp;

};

long

get_alias_set (t)

     tree t;

{

  if (tree_code_type[t->common.code] != 't' && t->common.type == 0)

    return 0;

  if (tree_code_type[t->common.code] != 't')

    {

      while (t->exp.operands[0])

        t = t->exp.operands[0];

    }

}

/* There should be exactly three IF conditionals if we thread jumps

   properly.  */

/* { dg-final { scan-tree-dump-times "if " 3 "dom2"} } */

/* { dg-final { cleanup-tree-dump "dom2" } } */