--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/IntegerEqualsCanonicalizerTest.java	2016-12-07 13:48:25.188619769 -0800
@@ -0,0 +1,176 @@
+/*
+ * Copyright (c) 2011, 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.core.test;
+
+import org.junit.Test;
+
+import org.graalvm.compiler.nodes.FrameState;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
+import org.graalvm.compiler.phases.common.CanonicalizerPhase;
+import org.graalvm.compiler.phases.tiers.PhaseContext;
+
+public class IntegerEqualsCanonicalizerTest extends GraalCompilerTest {
+
+    @Test
+    public void testSubtractEqualsZero() {
+        test("testSubtractEqualsZeroSnippet", "testSubtractEqualsZeroReference");
+    }
+
+    public static int testSubtractEqualsZeroReference(int a, int b) {
+        if (a == b) {
+            return 1;
+        }
+        return 0;
+    }
+
+    public static int testSubtractEqualsZeroSnippet(int a, int b) {
+        if (a - b == 0) {
+            return 1;
+        }
+        return 0;
+    }
+
+    @Test
+    public void testSubtractEqualsZeroLong() {
+        test("testSubtractEqualsZeroLongSnippet", "testSubtractEqualsZeroLongReference");
+    }
+
+    public static int testSubtractEqualsZeroLongReference(long a, long b) {
+        if (a == b) {
+            return 1;
+        }
+        return 0;
+    }
+
+    public static int testSubtractEqualsZeroLongSnippet(long a, long b) {
+        if (a - b == 0) {
+            return 1;
+        }
+        return 0;
+    }
+
+    /**
+     * Tests the canonicalization of (x >>> const) == 0 to x |test| (-1 << const).
+     */
+    @Test
+    public void testShiftEquals() {
+        test("testShiftEqualsSnippet", "testShiftEqualsReference");
+    }
+
+    @SuppressWarnings("unused") private static int field;
+
+    public static void testShiftEqualsSnippet(int x, int[] array, int y) {
+        // optimize
+        field = (x >>> 10) == 0 ? 1 : 0;
+        field = (array.length >> 10) == 0 ? 1 : 0;
+        field = (x << 10) == 0 ? 1 : 0;
+        // don't optimize
+        field = (x >> 10) == 0 ? 1 : 0;
+        field = (x >>> y) == 0 ? 1 : 0;
+        field = (x >> y) == 0 ? 1 : 0;
+        field = (x << y) == 0 ? 1 : 0;
+        field = (x >>> y) == 1 ? 1 : 0;
+        field = (x >> y) == 1 ? 1 : 0;
+        field = (x << y) == 1 ? 1 : 0;
+    }
+
+    public static void testShiftEqualsReference(int x, int[] array, int y) {
+        field = (x & 0xfffffc00) == 0 ? 1 : 0;
+        field = (array.length & 0xfffffc00) == 0 ? 1 : 0;
+        field = (x & 0x3fffff) == 0 ? 1 : 0;
+        // don't optimize signed right shifts
+        field = (x >> 10) == 0 ? 1 : 0;
+        // don't optimize no-constant shift amounts
+        field = (x >>> y) == 0 ? 1 : 0;
+        field = (x >> y) == 0 ? 1 : 0;
+        field = (x << y) == 0 ? 1 : 0;
+        // don't optimize non-zero comparisons
+        field = (x >>> y) == 1 ? 1 : 0;
+        field = (x >> y) == 1 ? 1 : 0;
+        field = (x << y) == 1 ? 1 : 0;
+    }
+
+    @Test
+    public void testCompare() {
+        test("testCompareSnippet", "testCompareReference");
+    }
+
+    public static void testCompareSnippet(int x, int y, int[] array1, int[] array2) {
+        int tempX = x;
+        int array1Length = array1.length;
+        int array2Length = array2.length;
+        // optimize
+        field = x == tempX ? 1 : 0;
+        field = x != tempX ? 1 : 0;
+        field = array1Length != (-1 - array2Length) ? 1 : 0;
+        field = array1Length == (-1 - array2Length) ? 1 : 0;
+        // don't optimize
+        field = x == y ? 1 : 0;
+        field = array1Length == array2Length ? 1 : 0;
+        field = array1Length == (-array2Length) ? 1 : 0;
+    }
+
+    public static void testCompareReference(int x, int y, int[] array1, int[] array2) {
+        int array1Length = array1.length;
+        int array2Length = array2.length;
+        // optimize
+        field = 1;
+        field = 0;
+        field = 1;
+        field = 0;
+        // don't optimize (overlapping value ranges)
+        field = x == y ? 1 : 0;
+        field = array1Length == array2Length ? 1 : 0;
+        field = array1Length == (-array2Length) ? 1 : 0;
+    }
+
+    public static boolean testNormalIntegerTest(int a) {
+        return (a & 8) != 0;
+    }
+
+    public static boolean testAlternateIntegerTest(int a) {
+        return (a & 8) == 8;
+    }
+
+    @Test
+    public void testIntegerTest() {
+        test("testNormalIntegerTest", "testAlternateIntegerTest");
+    }
+
+    private void test(String snippet, String referenceSnippet) {
+        StructuredGraph graph = getCanonicalizedGraph(snippet);
+        StructuredGraph referenceGraph = getCanonicalizedGraph(referenceSnippet);
+        assertEquals(referenceGraph, graph);
+    }
+
+    private StructuredGraph getCanonicalizedGraph(String snippet) {
+        StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES);
+        new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
+        for (FrameState state : graph.getNodes(FrameState.TYPE).snapshot()) {
+            state.replaceAtUsages(null);
+            state.safeDelete();
+        }
+        return graph;
+    }
+}