--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/spi/LoweringTool.java	Thu Jun 28 13:39:40 2012 +0200
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2011, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.graal.nodes.spi;
+
+import com.oracle.graal.api.code.*;
+import com.oracle.graal.api.meta.*;
+import com.oracle.graal.nodes.*;
+
+public interface LoweringTool {
+    GraalCodeCacheProvider getRuntime();
+    ValueNode getGuardAnchor();
+    ValueNode createNullCheckGuard(ValueNode object, long leafGraphId);
+    ValueNode createGuard(BooleanNode condition, DeoptimizationReason deoptReason, DeoptimizationAction action, long leafGraphId);
+    ValueNode createGuard(BooleanNode condition, DeoptimizationReason deoptReason, DeoptimizationAction action, boolean negated, long leafGraphId);
+    Assumptions assumptions();
+}
+