tree-ssa-pre.c (phi_translate_set): Add constants to phi translation cache.

2008-10-16  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (phi_translate_set): Add constants to phi
	translation cache.

From-SVN: r141182

gcc/ChangeLog

+2008-10-16  Daniel Berlin  <dberlin@dberlin.org>
+
+	* tree-ssa-pre.c (phi_translate_set): Add constants to phi
+	translation cache.
+
 2008-10-16  Joseph Myers  <joseph@codesourcery.com>
 
 	PR c/33192

gcc/tree-ssa-pre.c

@@ -1745,9 +1745,8 @@ phi_translate_set (bitmap_set_t dest, bitmap_set_t set, basic_block pred,
       pre_expr translated;
       translated = phi_translate (expr, set, NULL, pred, phiblock);
 
-      /* Don't add constants or empty translations to the cache, since
-	 we won't look them up that way, or use the result, anyway.  */
-      if (translated && !value_id_constant_p (get_expr_value_id (translated)))
+      /* Don't add empty translations to the cache  */
+      if (translated)
 	phi_trans_add (expr, translated, pred);
 
       if (translated != NULL)