Fix ICE in updating inline summaries

[Jan Hubicka]

Hi,
my yesterday patch introduced ICE on combining -O2 and -O0 translation
units (since the second has missing summary).

Bootstrapped/regtested x86_64-linux, comitted.

Honza

        * ipa-fnsummary.c (ipa_merge_fn_summary_after_inlining): Check
        for missing EDGE_REF
        * ipa-prop.c (update_jump_functions_after_inlining): Likewise.
Index: ipa-fnsummary.c
===================================================================
--- ipa-fnsummary.c     (revision 277503)
+++ ipa-fnsummary.c     (working copy)
@@ -3315,7 +3315,7 @@ ipa_merge_fn_summary_after_inlining (str
   if (ipa_node_params_sum && callee_info->conds)
     {
       class ipa_edge_args *args = IPA_EDGE_REF (edge);
-      int count = ipa_get_cs_argument_count (args);
+      int count = args ? ipa_get_cs_argument_count (args) : 0;
       int i;
 
       if (count)
Index: ipa-prop.c
===================================================================
--- ipa-prop.c  (revision 277503)
+++ ipa-prop.c  (working copy)
@@ -2741,7 +2741,7 @@ update_jump_functions_after_inlining (st
          /* We must check range due to calls with variable number of arguments
             and we cannot combine jump functions with operations.  */
          if (dst->value.pass_through.operation == NOP_EXPR
-             && (dst->value.pass_through.formal_id
+             && (top && dst->value.pass_through.formal_id
                  < ipa_get_cs_argument_count (top)))
            {
              int dst_fid = dst->value.pass_through.formal_id;
@@ -3430,7 +3430,7 @@ update_indirect_edges_after_inlining (st
        continue;
 
       /* We must check range due to calls with variable number of arguments:  
*/
-      if (ici->param_index >= ipa_get_cs_argument_count (top))
+      if (!top || ici->param_index >= ipa_get_cs_argument_count (top))
        {
          ici->param_index = -1;
          continue;