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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;

enum tree_code

{

  SET_TYPE,

  RECORD_TYPE,

  LAST_AND_UNUSED_TREE_CODE

};

extern const char tree_code_type[];

struct tree_common

{

  enum tree_code code:8;

};

union tree_node

{

  struct tree_common common;

};

readonly_fields_p (type)

     tree type;

{

  if (type->common.code != RECORD_TYPE)

    return;

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

    abort ();

  return;

}

/* A good optimizer would realize that the cast to (unsigned int) is

   useless as the earlier cast of the same value of (unsigned char) will

   always produce the same result.  */

/* { dg-final { scan-tree-dump-times "\\(unsigned int\\)" 0 "dom2"} } */

/* There should be one load of ->common.code.  We currently fail this

   because we load from ->common.code using different types.  */

/* { dg-final { scan-tree-dump-times "common\.code" 1 "dom2"} } */

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