--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/StaticDeoptimizingNode.java	Fri Feb 02 17:28:17 2018 -0800
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2017, 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;
+
+import org.graalvm.compiler.debug.GraalError;
+
+import jdk.vm.ci.meta.DeoptimizationAction;
+import jdk.vm.ci.meta.DeoptimizationReason;
+import jdk.vm.ci.meta.JavaConstant;
+
+public interface StaticDeoptimizingNode extends ValueNodeInterface {
+
+    DeoptimizationReason getReason();
+
+    DeoptimizationAction getAction();
+
+    JavaConstant getSpeculation();
+
+    /**
+     * Describes how much information is gathered when deoptimization triggers.
+     *
+     * This enum is {@link Comparable} and orders its element from highest priority to lowest
+     * priority.
+     */
+    enum GuardPriority {
+        Speculation,
+        Profile,
+        None;
+
+        public boolean isHigherPriorityThan(GuardPriority other) {
+            return this.compareTo(other) < 0;
+        }
+
+        public boolean isLowerPriorityThan(GuardPriority other) {
+            return this.compareTo(other) > 0;
+        }
+
+        public static GuardPriority highest() {
+            return Speculation;
+        }
+    }
+
+    default GuardPriority computePriority() {
+        if (getSpeculation() != null && getSpeculation().isNonNull()) {
+            return GuardNode.GuardPriority.Speculation;
+        }
+        switch (getAction()) {
+            case InvalidateReprofile:
+            case InvalidateRecompile:
+                return GuardNode.GuardPriority.Profile;
+            case RecompileIfTooManyDeopts:
+            case InvalidateStopCompiling:
+            case None:
+                return GuardNode.GuardPriority.None;
+        }
+        throw GraalError.shouldNotReachHere();
+    }
+}