--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes.test/src/org/graalvm/compiler/nodes/test/LoopPhiCanonicalizerTest.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2013, 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.test;
+
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import org.graalvm.compiler.core.test.GraalCompilerTest;
+import org.graalvm.compiler.graph.iterators.NodePredicate;
+import org.graalvm.compiler.nodes.LoopBeginNode;
+import org.graalvm.compiler.nodes.PhiNode;
+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 LoopPhiCanonicalizerTest extends GraalCompilerTest {
+
+    private static int[] array = new int[1000];
+
+    @BeforeClass
+    public static void before() {
+        for (int i = 0; i < array.length; i++) {
+            array[i] = i;
+        }
+    }
+
+    public static long loopSnippet() {
+        int a = 0;
+        int b = 0;
+        int c = 0;
+        int d = 0;
+
+        long sum = 0;
+        while (d < 1000) {
+            sum += array[a++] + array[b++] + array[c++] + array[d++];
+        }
+        return sum;
+    }
+
+    @Test
+    public void test() {
+        StructuredGraph graph = parseEager("loopSnippet", AllowAssumptions.YES);
+        NodePredicate loopPhis = node -> node instanceof PhiNode && ((PhiNode) node).merge() instanceof LoopBeginNode;
+
+        PhaseContext context = new PhaseContext(getProviders());
+        Assert.assertEquals(5, graph.getNodes().filter(loopPhis).count());
+        new CanonicalizerPhase().apply(graph, context);
+        Assert.assertEquals(2, graph.getNodes().filter(loopPhis).count());
+
+        test("loopSnippet");
+    }
+}