Cgraph alias reorg 17/14 (fix ipa-prop computation of varying args)

[Jan Hubicka]

Hi,
while breaking up the patch Imissed two pots in ipa-prop, where we need to walk 
aliases.
This leads to segfault while compiling Mozilla.  Also because 
alled_with_var_arguments
is recomputed at IPA time, we don't need to stream it.

Bootstrapped/regtested x86_64-linux, comitted.

Honza

Index: ChangeLog
===================================================================
--- ChangeLog   (revision 174954)
+++ ChangeLog   (working copy)
@@ -1,5 +1,12 @@
 2011-06-11  Jan Hubicka  <j...@suse.cz>
 
+       * ipa-prop.c (ipa_make_edge_direct_to_target): Fix code setting varying 
args.
+       (ipa_update_after_lto_read): Likewise.
+       (ipa_write_node_info): Do not sream call_with_var_arguments.
+       (ipa_read_node_info): Likewise.
+
+2011-06-11  Jan Hubicka  <j...@suse.cz>
+
        * ipa.c (cgraph_comdat_can_be_unshared_p): Fix pasto.
 
 2011-06-11  Jan Hubicka  <j...@suse.cz>
Index: ipa-prop.c
===================================================================
--- ipa-prop.c  (revision 174951)
+++ ipa-prop.c  (working copy)
@@ -1719,6 +1719,7 @@ ipa_make_edge_direct_to_target (struct c
          fprintf (dump_file, "\n");
        }
     }
+  callee = cgraph_function_or_thunk_node (callee, NULL);
 
   if (ipa_get_cs_argument_count (IPA_EDGE_REF (ie))
       != ipa_get_param_count (IPA_NODE_REF (callee)))
@@ -2815,7 +2816,6 @@ ipa_write_node_info (struct output_block
   lto_output_uleb128_stream (ob->main_stream, node_ref);
 
   bp = bitpack_create (ob->main_stream);
-  bp_pack_value (&bp, info->called_with_var_arguments, 1);
   gcc_assert (info->uses_analysis_done
              || ipa_get_param_count (info) == 0);
   gcc_assert (!info->node_enqueued);
@@ -2858,7 +2858,6 @@ ipa_read_node_info (struct lto_input_blo
   ipa_initialize_node_params (node);
 
   bp = lto_input_bitpack (ib);
-  info->called_with_var_arguments = bp_unpack_value (&bp, 1);
   if (ipa_get_param_count (info) != 0)
     info->uses_analysis_done = true;
   info->node_enqueued = false;
@@ -3015,9 +3014,12 @@ ipa_update_after_lto_read (void)
     if (node->analyzed)
       for (cs = node->callees; cs; cs = cs->next_callee)
        {
+         struct cgraph_node *callee;
+
+         callee = cgraph_function_or_thunk_node (cs->callee, NULL);
          if (ipa_get_cs_argument_count (IPA_EDGE_REF (cs))
-             != ipa_get_param_count (IPA_NODE_REF (cs->callee)))
-           ipa_set_called_with_variable_arg (IPA_NODE_REF (cs->callee));
+             != ipa_get_param_count (IPA_NODE_REF (callee)))
+           ipa_set_called_with_variable_arg (IPA_NODE_REF (callee));
        }
 }