gcc/testsuite/gcc.dg/tree-ssa/20030711-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-dom3" } */
   3
   4
   5 union tree_node;
   6 typedef union tree_node *tree;
   7 struct tree_vec
   8 {
   9           int length;
  10             tree a[1];
  11 };
  12 struct tree_type
  13 {
  14           tree binfo;
  15 };
  16 union tree_node
  17 {
  18           struct tree_type type;
  19             struct tree_vec vec;
  20 };
  21
  22 void
  23 record_component_aliases (type)
  24      tree type;
  25 {
  26   int i;
  27   if (4 >= type->type.binfo->vec.length)
  28     abort ();
  29   for (; i < ((
  30                 {
  31                 const tree __t = type->type.binfo;
  32                 if (4 >= __t->vec.length)
  33                 abort (); type->type.binfo->vec.a[4];}
  34               )->vec.length);)
  35     {
  36       if (4 >= type->type.binfo->vec.length)
  37         abort ();
  38       blah ();
  39     }
  40 }
  41
  42 /* The call to blah can not be eliminated.  */
  43 /* { dg-final { scan-tree-dump-times "blah \\(\\)" 1 "dom3" } } */
  44
  45 /* There should be four IF conditionals.  */
  46 /* { dg-final { scan-tree-dump-times "if " 4 "dom3"} } */
  47
  48 /* There should be two loads of type.binfo.  */
  49 /* { dg-final { scan-tree-dump-times "type\\.binfo" 2 "dom3"} } */
  50
  51 /* There should be four loads of vec.length.  */
  52 /* { dg-final { scan-tree-dump-times "vec.length" 4 "dom3"} } */
  53