ipa-cp.c (ipcp_versionable_function_p): Thunks are not versionable.

	* ipa-cp.c (ipcp_versionable_function_p): Thunks are not versionable.
	(ipcp_initialize_node_lattices): Do not deal with aliases; Do not try to
	propagate through thunks.
	(ipcp_change_tops_to_bottom): Do not deal with aliases.

From-SVN: r174916

gcc/ChangeLog

 2011-06-10  Jan Hubicka  <jh@suse.cz>
 
+	* ipa-cp.c (ipcp_versionable_function_p): Thunks are not versionable.
+	(ipcp_initialize_node_lattices): Do not deal with aliases; Do not try to
+	propagate through thunks.
+	(ipcp_change_tops_to_bottom): Do not deal with aliases.
+
+2011-06-10  Jan Hubicka  <jh@suse.cz>
+
 	* ipa-prop.c (ipa_write_node_info): Stream jump functions for indirect
 	calls.
 	(ipa_read_node_info): Likewise.

gcc/ipa-cp.c

@@ -354,6 +354,10 @@ ipcp_versionable_function_p (struct cgraph_node *node)
   if (node->alias)
     return false;
 
+  /* We don't know how to clone thunks.  */
+  if (node->thunk.thunk_p)
+    return false;
+
   /* There are a number of generic reasons functions cannot be versioned.  We
      also cannot remove parameters if there are type attributes such as fnspec
      present.  */
@@ -507,9 +511,11 @@ ipcp_initialize_node_lattices (struct cgraph_node *node)
   struct ipa_node_params *info = IPA_NODE_REF (node);
   enum ipa_lattice_type type;
 
-  if (ipa_is_called_with_var_arguments (info) || node->alias)
+  if (ipa_is_called_with_var_arguments (info))
     type = IPA_BOTTOM;
-  else if (node->local.local)
+  /* We don't know how to clone thunks even when they are local.  */
+  else if (node->local.local
+	   && !node->thunk.thunk_p)
     type = IPA_TOP;
   /* When cloning is allowed, we can assume that externally visible functions
      are not called.  We will compensate this by cloning later.  */
@@ -592,6 +598,7 @@ ipcp_change_tops_to_bottom (void)
 
   prop_again = false;
   for (node = cgraph_nodes; node; node = node->next)
+    if (!node->alias)
       {
 	struct ipa_node_params *info = IPA_NODE_REF (node);
 	count = ipa_get_param_count (info);
@@ -813,6 +820,7 @@ ipcp_iterate_stage (void)
     ipa_update_after_lto_read ();
 
   for (node = cgraph_nodes; node; node = node->next)
+    if (!node->alias)
       {
 	ipcp_initialize_node_lattices (node);
 	ipcp_compute_node_scale (node);