Do not insert statements computing the true predicate.

2010-06-25  Sebastian Pop  <sebastian.pop@amd.com>

	* tree-if-conv.c (insert_gimplified_predicates): Do not insert
	statements computing the true predicate.

From-SVN: r161398

gcc/ChangeLog

 2010-06-25  Sebastian Pop  <sebastian.pop@amd.com>
 
+	* tree-if-conv.c (insert_gimplified_predicates): Do not insert
+	statements computing the true predicate.
+
+2010-06-25  Sebastian Pop  <sebastian.pop@amd.com>
+
 	* tree-if-conv.c (init_bb_predicate): Initialize the predicate
 	to boolean_true_node.
 	(reset_bb_predicate): New.

gcc/tree-if-conv.c

@@ -1021,6 +1021,15 @@ insert_gimplified_predicates (loop_p loop)
       basic_block bb = ifc_bbs[i];
       gimple_seq stmts = bb_predicate_gimplified_stmts (bb);
 
+      if (!is_predicated (bb))
+	{
+	  /* Do not insert statements for a basic block that is not
+	     predicated.  Also make sure that the predicate of the
+	     basic block is set to true.  */
+	  reset_bb_predicate (bb);
+	  continue;
+	}
+
       if (stmts)
 	{
 	  gimple_stmt_iterator gsi = gsi_last_bb (bb);