[PATCH, PR lto/41932] Initialize stuff properly in ipa_update_after_lto_read

[Martin Jambor]

Hi,

I believe the following patch should fix PR lto/41932.  I have not
tried with it with their testcase but we have a similiar one in our
testsuite, namely gcc.dg/lto/20090126-1, which only passes because
Honza disabled indirect inlining in whopr.  When I implemented parm
call note streaming and enabled it the problem surfaced.

The NULL pointer dereference is fixed by calling the proper function
to initialize ipa-prop parameter descriptor array.  I have also added
code to ensure that ipa-prop node and edge descriptor arrays are big
enough since I did not see anything always doing that earlier on the
paths leading to this function.

Bootstrapped and tested on x86_64-linux.  OK for trunk?

Thanks,

Martin



2009-11-10  Martin Jambor  <mjambor@xxxxxxx>

        PR lto/41932
        * ipa-prop.c (ipa_update_after_lto_read): Call
        ipa_check_create_node_params and ipa_check_create_edge_args.  Also
        call ipa_initialize_node_params instead of ipa_populate_param_decls.

Index: icln/gcc/ipa-prop.c
===================================================================
--- icln.orig/gcc/ipa-prop.c
+++ icln/gcc/ipa-prop.c
@@ -2158,11 +2158,14 @@ ipa_update_after_lto_read (void)
   struct cgraph_node *node;
   struct cgraph_edge *cs;
 
+  ipa_check_create_node_params ();
+  ipa_check_create_edge_args ();
+
   for (node = cgraph_nodes; node; node = node->next)
     {
       if (!node->analyzed)
        continue;
-      ipa_populate_param_decls (node, IPA_NODE_REF (node));
+      ipa_initialize_node_params (node);
       for (cs = node->callees; cs; cs = cs->next_callee)
        {
          if (ipa_get_cs_argument_count (IPA_EDGE_REF (cs))