tree-streamer-out.c (streamer_write_chain): Do not temporarily set TREE_CHAIN to NULL_TREE.

2014-04-03  Richard Biener  <rguenther@suse.de>

	* tree-streamer-out.c (streamer_write_chain): Do not temporarily
	set TREE_CHAIN to NULL_TREE.

From-SVN: r209058

gcc/ChangeLog

 2014-04-03  Richard Biener  <rguenther@suse.de>
 
+	* tree-streamer-out.c (streamer_write_chain): Do not temporarily
+	set TREE_CHAIN to NULL_TREE.
+
+2014-04-03  Richard Biener  <rguenther@suse.de>
+
 	PR tree-optimization/60740
 	* graphite-scop-detection.c (stmt_simple_for_scop_p): Iterate
 	over all GIMPLE_COND operands.

gcc/tree-streamer-out.c

@@ -523,13 +523,6 @@ streamer_write_chain (struct output_block *ob, tree t, bool ref_p)
 {
   while (t)
     {
-      tree saved_chain;
-
-      /* Clear TREE_CHAIN to avoid blindly recursing into the rest
-	 of the list.  */
-      saved_chain = TREE_CHAIN (t);
-      TREE_CHAIN (t) = NULL_TREE;
-
       /* We avoid outputting external vars or functions by reference
 	 to the global decls section as we do not want to have them
 	 enter decl merging.  This is, of course, only for the call
@@ -541,7 +534,6 @@ streamer_write_chain (struct output_block *ob, tree t, bool ref_p)
       else
 	stream_write_tree (ob, t, ref_p);
 
-      TREE_CHAIN (t) = saved_chain;
       t = TREE_CHAIN (t);
     }