re PR middle-end/39922 (Revision 146817 caused many regressions on trunk)

        PR middle-end/39922
        * tree-outof-ssa.c (insert_value_copy_on_edge): Don't convert
        constants.

From-SVN: r146889

gcc/ChangeLog

+2009-04-28  Michael Matz  <matz@suse.de>
+
+	PR middle-end/39922
+	* tree-outof-ssa.c (insert_value_copy_on_edge): Don't convert
+	constants.
+
 2009-04-28  Richard Guenther  <rguenther@suse.de>
 
 	* tree-vect-stmts.c (vect_get_vec_def_for_operand): Fix

gcc/tree-outof-ssa.c

@@ -184,7 +184,7 @@ insert_value_copy_on_edge (edge e, int dest, tree src)
   start_sequence ();
   mode = GET_MODE (SA.partition_to_pseudo[dest]);
   x = expand_expr (src, SA.partition_to_pseudo[dest], mode, EXPAND_NORMAL);
-  if (GET_MODE (x) != mode)
+  if (GET_MODE (x) != VOIDmode && GET_MODE (x) != mode)
     x = convert_to_mode (mode, x, TYPE_UNSIGNED (TREE_TYPE (src)));
   if (x != SA.partition_to_pseudo[dest])
     emit_move_insn (SA.partition_to_pseudo[dest], x);