--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/calc/ConvertNode.java	2016-12-09 00:55:13.841499758 -0800
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2014, 2014, 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 org.graalvm.compiler.nodes.calc;
+
+import org.graalvm.compiler.core.common.calc.Condition;
+import org.graalvm.compiler.nodes.ValueNode;
+import org.graalvm.compiler.nodes.ValueNodeInterface;
+
+import jdk.vm.ci.meta.Constant;
+import jdk.vm.ci.meta.ConstantReflectionProvider;
+
+/**
+ * Represents a conversion between primitive types.
+ */
+public interface ConvertNode extends ValueNodeInterface {
+
+    ValueNode getValue();
+
+    Constant convert(Constant c, ConstantReflectionProvider constantReflection);
+
+    Constant reverse(Constant c, ConstantReflectionProvider constantReflection);
+
+    /**
+     * Check whether a conversion is lossless.
+     *
+     * @return true iff reverse(convert(c)) == c for all c
+     */
+    boolean isLossless();
+
+    /**
+     * Check whether a conversion preserves comparison order.
+     *
+     * @param op a comparison operator
+     * @return true iff (c1 op c2) == (convert(c1) op convert(c2)) for all c1, c2
+     */
+    default boolean preservesOrder(Condition op) {
+        return isLossless();
+    }
+
+    /**
+     * Check whether a conversion preserves comparison order against a particular constant value.
+     *
+     * @param op a comparison operator
+     * @param value
+     * @param constantReflection
+     * @return true iff (c1 op value) == (convert(c1) op convert(value)) for value and all c1
+     */
+    default boolean preservesOrder(Condition op, Constant value, ConstantReflectionProvider constantReflection) {
+        return preservesOrder(op);
+    }
+}