--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/ConditionAnchorNode.java	2017-02-15 17:06:33.297399516 -0800
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2011, 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;
+
+import static org.graalvm.compiler.nodeinfo.InputType.Condition;
+import static org.graalvm.compiler.nodeinfo.InputType.Guard;
+import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
+import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
+
+import org.graalvm.compiler.core.common.type.StampFactory;
+import org.graalvm.compiler.graph.Node;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.graph.spi.Canonicalizable;
+import org.graalvm.compiler.graph.spi.CanonicalizerTool;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodeinfo.Verbosity;
+import org.graalvm.compiler.nodes.extended.GuardingNode;
+import org.graalvm.compiler.nodes.extended.ValueAnchorNode;
+import org.graalvm.compiler.nodes.spi.Lowerable;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+
+@NodeInfo(nameTemplate = "ConditionAnchor(!={p#negated})", allowedUsageTypes = Guard, cycles = CYCLES_0, size = SIZE_0)
+public final class ConditionAnchorNode extends FixedWithNextNode implements Canonicalizable.Unary<Node>, Lowerable, GuardingNode {
+
+    public static final NodeClass<ConditionAnchorNode> TYPE = NodeClass.create(ConditionAnchorNode.class);
+    @Input(Condition) LogicNode condition;
+    protected boolean negated;
+
+    public ConditionAnchorNode(LogicNode condition) {
+        this(condition, false);
+    }
+
+    public ConditionAnchorNode(LogicNode condition, boolean negated) {
+        super(TYPE, StampFactory.forVoid());
+        this.negated = negated;
+        this.condition = condition;
+    }
+
+    public LogicNode condition() {
+        return condition;
+    }
+
+    public boolean isNegated() {
+        return negated;
+    }
+
+    @Override
+    public String toString(Verbosity verbosity) {
+        if (verbosity == Verbosity.Name && negated) {
+            return "!" + super.toString(verbosity);
+        } else {
+            return super.toString(verbosity);
+        }
+    }
+
+    @Override
+    public Node canonical(CanonicalizerTool tool, Node forValue) {
+        if (forValue instanceof LogicNegationNode) {
+            LogicNegationNode negation = (LogicNegationNode) forValue;
+            return new ConditionAnchorNode(negation.getValue(), !negated);
+        }
+        if (forValue instanceof LogicConstantNode) {
+            LogicConstantNode c = (LogicConstantNode) forValue;
+            if (c.getValue() != negated) {
+                return null;
+            } else {
+                return new ValueAnchorNode(null);
+            }
+        }
+        if (tool.allUsagesAvailable() && this.hasNoUsages()) {
+            return null;
+        }
+        return this;
+    }
+
+    @Override
+    public void lower(LoweringTool tool) {
+        if (graph().getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS) {
+            ValueAnchorNode newAnchor = graph().add(new ValueAnchorNode(null));
+            graph().replaceFixedWithFixed(this, newAnchor);
+        }
+    }
+
+    @Override
+    public Node getValue() {
+        return condition;
+    }
+}