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/* { dg-do compile } */

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

extern void abort (void);

union tree_node;

typedef union tree_node *tree;

extern const char tree_code_type[];

union tree_node

{

  int code;

  long pointer_alias_set;

};

long

get_alias_set (t)

     tree t;

{

  if (tree_code_type[t->code])

    abort ();

  if (t->pointer_alias_set)

    {

      tree __t = t;

      if (tree_code_type[__t->code])

        abort ();

    }

}

/* There should be precisely one load of {t,__t}->code.  If there is

   more than one, then the dominator optimizations failed.  */

/* { dg-final { scan-tree-dump-times "->code" 1 "dom2"} } */

/* There should be precisely one load of tree_code_type.  If there is

   more than one, then the dominator optimizations failed.  */

/* { dg-final { scan-tree-dump-times "tree_code_type" 1 "dom2"} } */

/* There should be one IF conditional.  If 'tree_code_type[t->code]' is

   zero, then the third if() conditional is unnecessary.  That should cause

   the call to abort() to be removed, which in turn causes the whole second

   if() to disappear.  */

/* { dg-final { scan-tree-dump-times "if " 1 "dom2"} } */

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