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/* { dg-do compile } */

/* { dg-options "-O1 -fdump-tree-dom3 -fdump-tree-optimized" } */

extern void abort (void);

union tree_node;

typedef union tree_node *tree;

extern const char tree_code_type[];

struct tree_common

{

  int code;

};

struct tree_decl

{

  long pointer_alias_set;

};

union tree_node

{

  struct tree_common common;

  struct tree_decl decl;

};

long

blah (decl, set)

     tree decl;

     long set;

{

  decl->decl.pointer_alias_set = set;

  if (tree_code_type[decl->common.code] != 'd')

    abort ();

  record_alias_subset (decl->decl.pointer_alias_set);

  if (set != -1)

    set = 0;

  return set;

}

/* There should be precisely one reference to pointer_alias_set.  If there is

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

/* { dg-final { scan-tree-dump-times "pointer_alias_set" 1 "dom3"} } */

/* { dg-final { cleanup-tree-dump "dom3" } } */

/* The assignment set = -1 in the ELSE clause of the last IF

   statement should be removed by the final cleanup phase.  */

/* { dg-final { scan-tree-dump-times "set = -1" 0 "optimized"} } */

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