dbxout.c (dbxout_block): Reinstate test on TREE_USED.

	* dbxout.c (dbxout_block): Reinstate test on TREE_USED.
	* tree-ssa-live.c (remove_unused_scope_block_p): Update TREE_USED bit.	* dbxout.c (dbxout_block): Reinstate test on TREE_USED.
	* tree-ssa-live.c (remove_unused_scope_block_p): Update TREE_USED bit.

From-SVN: r146289

gcc/ChangeLog

+2009-04-17  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* dbxout.c (dbxout_block): Reinstate test on TREE_USED.
+	* tree-ssa-live.c (remove_unused_scope_block_p): Update TREE_USED bit.
+
 2009-04-17  Richard Guenther  <rguenther@suse.de>
 
 	* tree-ssa-structalias.c (get_constraint_for_component_ref):

gcc/dbxout.c

@@ -3594,7 +3594,7 @@ dbxout_block (tree block, int depth, tree args)
   while (block)
     {
       /* Ignore blocks never expanded or otherwise marked as real.  */
-      if (TREE_ASM_WRITTEN (block))
+      if (TREE_USED (block) && TREE_ASM_WRITTEN (block))
 	{
 	  int did_output;
 	  int blocknum = BLOCK_NUMBER (block);

gcc/tree-ssa-live.c

@@ -595,6 +595,8 @@ remove_unused_scope_block_p (tree scope)
    /* Verfify that only blocks with source location set
       are entry points to the inlined functions.  */
      gcc_assert (BLOCK_SOURCE_LOCATION (scope) == UNKNOWN_LOCATION);
+
+   TREE_USED (scope) = !unused;
    return unused;
 }