1/* { dg-do compile } */
2/* { dg-options "-O1 -fdump-tree-dom2 -fdump-tree-optimized" } */
3
4extern void abort (void);
5union tree_node;
6typedef union tree_node *tree;
7extern const char tree_code_type[];
8struct tree_common
9{
10  int code;
11};
12struct tree_decl
13{
14  long pointer_alias_set;
15};
16union tree_node
17{
18  struct tree_common common;
19  struct tree_decl decl;
20};
21long
22blah (decl, set)
23     tree decl;
24     long set;
25{
26  decl->decl.pointer_alias_set = oof();
27  if (tree_code_type[decl->common.code] != 'd')
28    abort ();
29  record_alias_subset (decl->decl.pointer_alias_set);
30  if (set != -1)
31    set = 0;
32  return set;
33}
34
35/* There should be precisely one reference to pointer_alias_set.  If there is
36   more than one, then the dominator optimizations failed.  */
37/* { dg-final { scan-tree-dump-times "pointer_alias_set" 1 "dom2"} } */
38/* { dg-final { cleanup-tree-dump "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"} } */
43/* { dg-final { cleanup-tree-dump "optimized" } } */
44