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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-dom2" } */
   3
   4 extern void abort (void);
   5 extern void blah (void);
   6
   7 union tree_node;
   8 typedef union tree_node *tree;
   9 struct tree_vec
  10 {
  11           int length;
  12             tree a[1];
  13 };
  14 struct tree_type
  15 {
  16           tree binfo;
  17 };
  18 union tree_node
  19 {
  20           struct tree_type type;
  21             struct tree_vec vec;
  22 };
  23
  24 void
  25 record_component_aliases (type)
  26      tree type;
  27 {
  28   int i;
  29   if (4 >= type->type.binfo->vec.length)
  30     abort ();
  31   for (; i < ((
  32                 {
  33                 const tree __t = type->type.binfo;
  34                 if (4 >= __t->vec.length)
  35                 abort (); type->type.binfo->vec.a[4];}
  36               )->vec.length);)
  37     {
  38       if (4 >= type->type.binfo->vec.length)
  39         abort ();
  40       blah ();
  41     }
  42 }
  43
  44 /* The call to blah can not be eliminated.  */
  45 /* { dg-final { scan-tree-dump-times "blah \\(\\)" 1 "dom2" } } */
  46
  47 /* There should be four IF conditionals.  */
  48 /* { dg-final { scan-tree-dump-times "if " 4 "dom2"} } */
  49
  50 /* There should be two loads of type.binfo.  */
  51 /* { dg-final { scan-tree-dump-times "type\\.binfo" 2 "dom2"} } */
  52
  53 /* There should be four loads of vec.length.  */
  54 /* { dg-final { scan-tree-dump-times "vec.length" 4 "dom2"} } */
  55