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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-dom3" } */
   3
   4 extern void abort (void);
   5
   6 union tree_node;
   7 typedef union tree_node *tree;
   8 struct tree_vec
   9 {
  10           int length;
  11             tree a[1];
  12 };
  13 struct tree_type
  14 {
  15           tree binfo;
  16 };
  17 union tree_node
  18 {
  19           struct tree_type type;
  20             struct tree_vec vec;
  21 };
  22
  23 void
  24 record_component_aliases (type)
  25      tree type;
  26 {
  27   int i;
  28   if (4 >= type->type.binfo->vec.length)
  29     abort ();
  30   for (; i < ((
  31                 {
  32                 const tree __t = type->type.binfo;
  33                 if (4 >= __t->vec.length)
  34                 abort (); type->type.binfo->vec.a[4];}
  35               )->vec.length);)
  36     {
  37       if (4 >= type->type.binfo->vec.length)
  38         abort ();
  39       blah ();
  40     }
  41 }
  42
  43 /* The call to blah can not be eliminated.  */
  44 /* { dg-final { scan-tree-dump-times "blah \\(\\)" 1 "dom3" } } */
  45
  46 /* There should be four IF conditionals.  */
  47 /* { dg-final { scan-tree-dump-times "if " 3 "dom3"} } */
  48
  49 /* There should be two loads of type.binfo.  */
  50 /* { dg-final { scan-tree-dump-times "type\\.binfo" 2 "dom3"} } */
  51
  52 /* There should be four loads of vec.length.  */
  53 /* { dg-final { scan-tree-dump-times "vec.length" 3 "dom3"} } */
  54
  55 /* { dg-final { cleanup-tree-dump "dom3" } } */