[Bug tree-optimization/56265] [4.8 Regression] ICE in ipa_make_edge_direct_to_target

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56265

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-02-11 16:20:24 UTC ---
--- gcc/ipa-inline.c.jj    2013-01-11 09:02:48.000000000 +0100
+++ gcc/ipa-inline.c    2013-02-11 17:16:04.951958702 +0100
@@ -1792,7 +1792,7 @@ ipa_inline (void)
     }

   inline_small_functions ();
-  symtab_remove_unreachable_nodes (false, dump_file);
+  symtab_remove_unreachable_nodes (true, dump_file);
   free (order);

   /* Inline functions with a property that after inlining into all callers the
@@ -1876,6 +1876,9 @@ ipa_inline (void)

   if (dump_file)
     dump_inline_summaries (dump_file);
+
+  symtab_remove_unreachable_nodes (false, dump_file);
+
   /* In WPA we use inline summaries for partitioning process.  */
   if (!flag_wpa)
     inline_free_summary ();

fixes this.

The gcc-patches post said:
"This is bug.  The cleanup is supposed to happen just before inlining functions
called once.  The patch also adds the cleanup to same place into
do_whole_program_analysis and updates cgraphclones.c so we do not ice when
removing offline copy of the function after inlining."

but clearly that is too early, as the testcase shows.