1  /* { dg-do compile } */
       2  /* { dg-options "-O1 -fdump-tree-dom2 -fdump-tree-optimized" } */
       3      
       4  extern void abort (void);
       5  union tree_node;
       6  typedef union tree_node *tree;
       7  extern const char tree_code_type[];
       8  struct tree_common
       9  {
      10    int code;
      11  };
      12  struct tree_decl 
      13  {
      14    long pointer_alias_set;
      15  };
      16  union tree_node
      17  {
      18    struct tree_common common;
      19    struct tree_decl decl;
      20  };
      21  long oof (void);
      22  void record_alias_subset (long);
      23  long
      24  blah (decl, set)
      25       tree decl;
      26       long set;
      27  {
      28    decl->decl.pointer_alias_set = oof();
      29    if (tree_code_type[decl->common.code] != 'd')
      30      abort ();
      31    record_alias_subset (decl->decl.pointer_alias_set);
      32    if (set != -1)
      33      set = 0; 
      34    return set;
      35  }
      36  
      37  /* There should be precisely one reference to pointer_alias_set.  If there is
      38     more than one, then the dominator optimizations failed.  */
      39  /* { dg-final { scan-tree-dump-times "pointer_alias_set" 1 "dom2"} } */
      40  
      41  /* The assignment set = -1 in the ELSE clause of the last IF
      42     statement should be removed by the final cleanup phase.  */
      43  /* { dg-final { scan-tree-dump-times "set = -1" 0 "optimized"} } */