--- /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/calc/NormalizeCompareNode.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2009, 2015, 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 static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2;
+
+import org.graalvm.compiler.core.common.calc.Condition;
+import org.graalvm.compiler.core.common.type.Stamp;
+import org.graalvm.compiler.core.common.type.StampFactory;
+import org.graalvm.compiler.graph.IterableNodeType;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.graph.spi.CanonicalizerTool;
+import org.graalvm.compiler.nodeinfo.NodeCycles;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.ConstantNode;
+import org.graalvm.compiler.nodes.LogicConstantNode;
+import org.graalvm.compiler.nodes.LogicNode;
+import org.graalvm.compiler.nodes.ValueNode;
+
+import jdk.vm.ci.meta.ConstantReflectionProvider;
+import jdk.vm.ci.meta.JavaKind;
+
+/**
+ * Returns -1, 0, or 1 if either x < y, x == y, or x > y. If the comparison is undecided (one
+ * of the inputs is NaN), the result is 1 if isUnorderedLess is false and -1 if isUnorderedLess is
+ * true.
+ */
+@NodeInfo(cycles = NodeCycles.CYCLES_2, size = SIZE_2)
+public final class NormalizeCompareNode extends BinaryNode implements IterableNodeType {
+
+    public static final NodeClass<NormalizeCompareNode> TYPE = NodeClass.create(NormalizeCompareNode.class);
+    protected final boolean isUnorderedLess;
+
+    public NormalizeCompareNode(ValueNode x, ValueNode y, JavaKind kind, boolean isUnorderedLess) {
+        super(TYPE, StampFactory.forInteger(kind, -1, 1), x, y);
+        this.isUnorderedLess = isUnorderedLess;
+    }
+
+    public static ValueNode create(ValueNode x, ValueNode y, boolean isUnorderedLess, JavaKind kind, ConstantReflectionProvider constantReflection) {
+        ValueNode result = tryConstantFold(x, y, isUnorderedLess, kind, constantReflection);
+        if (result != null) {
+            return result;
+        }
+
+        return new NormalizeCompareNode(x, y, kind, isUnorderedLess);
+    }
+
+    protected static ValueNode tryConstantFold(ValueNode x, ValueNode y, boolean isUnorderedLess, JavaKind kind, ConstantReflectionProvider constantReflection) {
+        LogicNode result = CompareNode.tryConstantFold(Condition.EQ, x, y, null, false);
+        if (result instanceof LogicConstantNode) {
+            LogicConstantNode logicConstantNode = (LogicConstantNode) result;
+            LogicNode resultLT = CompareNode.tryConstantFold(Condition.LT, x, y, constantReflection, isUnorderedLess);
+            if (resultLT instanceof LogicConstantNode) {
+                LogicConstantNode logicConstantNodeLT = (LogicConstantNode) resultLT;
+                if (logicConstantNodeLT.getValue()) {
+                    return ConstantNode.forIntegerKind(kind, -1);
+                } else if (logicConstantNode.getValue()) {
+                    return ConstantNode.forIntegerKind(kind, 0);
+                } else {
+                    return ConstantNode.forIntegerKind(kind, 1);
+                }
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {
+        ValueNode result = tryConstantFold(x, y, isUnorderedLess, stamp().getStackKind(), tool.getConstantReflection());
+        if (result != null) {
+            return result;
+        }
+        return this;
+    }
+
+    @Override
+    public boolean inferStamp() {
+        return false;
+    }
+
+    @Override
+    public Stamp foldStamp(Stamp stampX, Stamp stampY) {
+        return stamp();
+    }
+
+    public boolean isUnorderedLess() {
+        return isUnorderedLess;
+    }
+}