[Bug lto/51635] [4.7 regression] ICE in in dwarf2out_finish, at dwarf2out.c:22494 when building Firefox's libxul

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51635

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-20 
14:47:25 UTC ---
Doesn't work.  Instead testing a similar

Index: gcc/lto/lto.c
===================================================================
--- gcc/lto/lto.c       (revision 182525)
+++ gcc/lto/lto.c       (working copy)
@@ -845,6 +845,14 @@ uniquify_nodes (struct data_in *data_in,
                    if (ix < i)
                      lto_fixup_types (f2);
                    streamer_tree_cache_insert_at (cache, f1, ix);
+                   /* Make sure that the type of a TYPE_DECL refers
+                      to the type decl that prevails in the prevailing
+                      record or union type.  */
+                   if (TREE_CODE (f1) == TYPE_DECL)
+                     {
+                       tree f1t = gimple_register_type (TREE_TYPE (f1));
+                       TYPE_NAME (f1t) = f1;
+                     }
                  }
            }