--- /dev/null	2017-07-07 09:32:09.000000000 -0700
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.loop.test/src/org/graalvm/compiler/loop/test/LoopPartialUnrollTest.java	2017-07-07 09:32:09.000000000 -0700
@@ -0,0 +1,139 @@
+/*
+ * 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.loop.test;
+
+import org.graalvm.compiler.core.test.GraalCompilerTest;
+import org.graalvm.compiler.graph.iterators.NodeIterable;
+import org.graalvm.compiler.nodes.LoopBeginNode;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.junit.Ignore;
+import org.junit.Test;
+
+public class LoopPartialUnrollTest extends GraalCompilerTest {
+
+    @Override
+    protected boolean checkLowTierGraph(StructuredGraph graph) {
+        NodeIterable<LoopBeginNode> loops = graph.getNodes().filter(LoopBeginNode.class);
+        for (LoopBeginNode loop : loops) {
+            if (loop.isMainLoop()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static long testMultiplySnippet(int arg) {
+        long r = 1;
+        for (int i = 0; branchProbability(0.99, i < arg); i++) {
+            r *= i;
+        }
+        return r;
+    }
+
+    @Test
+    public void testMultiply() {
+        test("testMultiplySnippet", 9);
+    }
+
+    public static int testNestedSumSnippet(int d) {
+        int c = 0;
+        for (int i = 0; i < d; i++) {
+            for (int j = 0; branchProbability(0.99, j < i); j++) {
+                c += j & 0x3;
+            }
+        }
+        return c;
+    }
+
+    @Test
+    public void testNestedSum() {
+        for (int i = 0; i < 1000; i++) {
+            test("testNestedSumSnippet", i);
+        }
+    }
+
+    public static int testSumDownSnippet(int d) {
+        int c = 0;
+        for (int j = d; branchProbability(0.99, j > -4); j--) {
+            c += j & 0x3;
+        }
+        return c;
+    }
+
+    @Test
+    public void testSumDown() {
+        test("testSumDownSnippet", 1);
+        for (int i = 0; i < 8; i++) {
+            test("testSumDownSnippet", i);
+        }
+    }
+
+    @Ignore("Phis which reference the backedge value of other Phis aren't handled properly")
+    @Test
+    public void testLoopCarried() {
+        test("testLoopCarriedSnippet", 1, 2);
+    }
+
+    public static int testLoopCarriedSnippet(int a, int b) {
+        int c = a;
+        int d = b;
+        for (int j = 0; j < a; j++) {
+            d = c;
+            c += 1;
+        }
+        return c + d;
+    }
+
+    public static long init = Runtime.getRuntime().totalMemory();
+    private int x;
+    private int z;
+
+    public int[] testComplexSnippet(int d) {
+        x = 3;
+        int y = 5;
+        z = 7;
+        for (int i = 0; i < d; i++) {
+            for (int j = 0; branchProbability(0.99, j < i); j++) {
+                z += x;
+            }
+            y = x ^ z;
+            if ((i & 4) == 0) {
+                z--;
+            } else if ((i & 8) == 0) {
+                Runtime.getRuntime().totalMemory();
+            }
+        }
+        return new int[]{x, y, z};
+    }
+
+    @Test
+    public void testComplex() {
+        for (int i = 0; i < 10; i++) {
+            test("testComplexSnippet", i);
+        }
+        test("testComplexSnippet", 10);
+        test("testComplexSnippet", 100);
+        test("testComplexSnippet", 1000);
+    }
+
+}