gcc/testsuite/gcc.dg/tree-ssa/20030728-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4
   5 union tree_node;
   6 typedef union tree_node *tree;
   7
   8 enum tree_code
   9 {
  10   ARRAY_TYPE,
  11   LAST_AND_UNUSED_TREE_CODE
  12 };
  13
  14 struct tree_common
  15 {
  16   enum tree_code code:8;
  17 };
  18
  19
  20
  21
  22
  23 union tree_node
  24 {
  25   struct tree_common common;
  26 };
  27
  28
  29
  30
  31 int
  32 objects_must_conflict_p (t1, t2)
  33      tree t1, t2;
  34 {
  35
  36   if ((t1->common.code == ARRAY_TYPE) != (t2
  37                                           && t2->common.code == ARRAY_TYPE))
  38     return 0;
  39
  40
  41   return foo (t2 ? get_alias_set (t2) : 0);
  42 }
  43
  44 /* There should be three assignments of variables to the value zero.  */
  45 /* { dg-final { scan-tree-dump-times " = 0" 3 "optimized"} } */
  46
  47