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  void record_alias_subset (long);
      22  long
      23  blah (decl, set)
      24       tree decl;
      25       long set;
      26  {
      27    decl->decl.pointer_alias_set = set;
      28    if (tree_code_type[decl->common.code] != 'd')
      29      abort ();
      30    record_alias_subset (decl->decl.pointer_alias_set);
      31    if (set != -1)
      32      set = 0; 
      33    return set;
      34  }
      35  
      36  /* There should be precisely one reference to pointer_alias_set.  If there is
      37     more than one, then the dominator optimizations failed.  */
      38  /* { dg-final { scan-tree-dump-times "pointer_alias_set" 1 "dom2"} } */
      39  
      40  /* The assignment set = -1 in the ELSE clause of the last IF
      41     statement should be removed by the final cleanup phase.  */
      42  /* { dg-final { scan-tree-dump-times "set = -1" 0 "optimized"} } */