[Bug lto/54811] [4.8 regression] tree code '�' is not supported in LTO streams

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54811



--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-10-05 
10:11:25 UTC ---

Testing



Index: gcc/tree-ssa-live.c

===================================================================

--- gcc/tree-ssa-live.c (revision 192114)

+++ gcc/tree-ssa-live.c (working copy)

@@ -621,6 +621,11 @@ clear_unused_block_pointer_1 (tree *tp,

   if (EXPR_P (*tp) && TREE_BLOCK (*tp)

       && !TREE_USED (TREE_BLOCK (*tp)))

     TREE_SET_BLOCK (*tp, NULL);

+  if (TREE_CODE (*tp) == VAR_DECL && DECL_DEBUG_EXPR_IS_FROM (*tp))

+    {

+      tree debug_expr = DECL_DEBUG_EXPR (*tp);

+      walk_tree (&debug_expr, clear_unused_block_pointer_1, NULL, NULL);

+    }

   return NULL_TREE;

 }