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

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b4fc4b2284625f42f7d2c71f847ad307fb10e295..935cb145e6c4a3119ff30c20bae9ecc21473eebc 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+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

diff --git a/gcc/ipa-cp.c b/gcc/ipa-cp.c
index 94aab5f5f76014fd4221eb3cc62bee8c38a6ba6b..ec0c83af3c1ca420539be1b10971e2c1cc9ce51e 100644 (file)
--- a/gcc/ipa-cp.c
+++ b/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.  */
@@ -592,40 +598,41 @@ ipcp_change_tops_to_bottom (void)
 
   prop_again = false;
   for (node = cgraph_nodes; node; node = node->next)
-    {
-      struct ipa_node_params *info = IPA_NODE_REF (node);
-      count = ipa_get_param_count (info);
-      for (i = 0; i < count; i++)
-       {
-         struct ipcp_lattice *lat = ipa_get_lattice (info, i);
-         if (lat->type == IPA_TOP)
-           {
-             prop_again = true;
-             if (dump_file)
-               {
-                 fprintf (dump_file, "Forcing param ");
-                 print_generic_expr (dump_file, ipa_get_param (info, i), 0);
-                 fprintf (dump_file, " of node %s to bottom.\n",
-                          cgraph_node_name (node));
-               }
-             lat->type = IPA_BOTTOM;
-           }
-         if (!ipa_param_cannot_devirtualize_p (info, i)
-             && ipa_param_types_vec_empty (info, i))
-           {
-             prop_again = true;
-             ipa_set_param_cannot_devirtualize (info, i);
-             if (dump_file)
-               {
-                 fprintf (dump_file, "Marking param ");
-                 print_generic_expr (dump_file, ipa_get_param (info, i), 0);
-                 fprintf (dump_file, " of node %s as unusable for "
-                          "devirtualization.\n",
-                          cgraph_node_name (node));
-               }
-           }
-       }
-    }
+    if (!node->alias)
+      {
+       struct ipa_node_params *info = IPA_NODE_REF (node);
+       count = ipa_get_param_count (info);
+       for (i = 0; i < count; i++)
+         {
+           struct ipcp_lattice *lat = ipa_get_lattice (info, i);
+           if (lat->type == IPA_TOP)
+             {
+               prop_again = true;
+               if (dump_file)
+                 {
+                   fprintf (dump_file, "Forcing param ");
+                   print_generic_expr (dump_file, ipa_get_param (info, i), 0);
+                   fprintf (dump_file, " of node %s to bottom.\n",
+                            cgraph_node_name (node));
+                 }
+               lat->type = IPA_BOTTOM;
+             }
+           if (!ipa_param_cannot_devirtualize_p (info, i)
+               && ipa_param_types_vec_empty (info, i))
+             {
+               prop_again = true;
+               ipa_set_param_cannot_devirtualize (info, i);
+               if (dump_file)
+                 {
+                   fprintf (dump_file, "Marking param ");
+                   print_generic_expr (dump_file, ipa_get_param (info, i), 0);
+                   fprintf (dump_file, " of node %s as unusable for "
+                            "devirtualization.\n",
+                            cgraph_node_name (node));
+                 }
+             }
+         }
+      }
   return prop_again;
 }
 
@@ -813,10 +820,11 @@ ipcp_iterate_stage (void)
     ipa_update_after_lto_read ();
 
   for (node = cgraph_nodes; node; node = node->next)
-    {
-      ipcp_initialize_node_lattices (node);
-      ipcp_compute_node_scale (node);
-    }
+    if (!node->alias)
+      {
+       ipcp_initialize_node_lattices (node);
+       ipcp_compute_node_scale (node);
+      }
   if (dump_file && (dump_flags & TDF_DETAILS))
     {
       ipcp_print_all_lattices (dump_file);