re PR middle-end/68117 (error: invalid PHI argument <<< Unknown tree: <invalid tree code> >>>)

2015-11-19  Richard Biener  <rguenther@suse.de>

	PR middle-end/68117
	* tree-ssa.c (delete_tree_ssa): Revert removal of call to
	redirect_edge_var_map_destroy.

From-SVN: r230594

gcc/ChangeLog

+2015-11-19  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/68117
+	* tree-ssa.c (delete_tree_ssa): Revert removal of call to
+	redirect_edge_var_map_destroy.
+
 2015-11-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/67770

gcc/tree-ssa.c

@@ -1126,6 +1126,9 @@ delete_tree_ssa (struct function *fn)
   fn->gimple_df->decls_to_pointers = NULL;
   fn->gimple_df->modified_noreturn_calls = NULL;
   fn->gimple_df = NULL;
+
+  /* We no longer need the edge variable maps.  */
+  redirect_edge_var_map_destroy ();
 }
 
 /* Return true if EXPR is a useless type conversion, otherwise return