--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements.test/src/org/graalvm/compiler/replacements/test/StringHashConstantTest.java	2017-02-15 17:08:55.231612469 -0800
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2016, 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.replacements.test;
+
+import org.graalvm.compiler.core.test.GraalCompilerTest;
+import org.graalvm.compiler.nodes.ConstantNode;
+import org.graalvm.compiler.nodes.FixedNode;
+import org.graalvm.compiler.nodes.ReturnNode;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.ValueNode;
+import jdk.vm.ci.meta.JavaConstant;
+import org.junit.Test;
+
+import jdk.vm.ci.meta.ResolvedJavaMethod;
+import static org.hamcrest.CoreMatchers.instanceOf;
+import org.junit.Assert;
+
+/**
+ * Tests constant folding of {@link String#hashCode()}.
+ */
+public class StringHashConstantTest extends GraalCompilerTest {
+
+    private static final String A_CONSTANT_STRING = "a constant string";
+
+    private ValueNode asConstant(StructuredGraph graph, String str) {
+        return ConstantNode.forConstant(getSnippetReflection().forObject(str), getMetaAccess(), graph);
+    }
+
+    @Test
+    public void test1() {
+        ResolvedJavaMethod method = getResolvedJavaMethod("parameterizedHashCode");
+        StructuredGraph graph = parseForCompile(method);
+
+        String s = "some string";
+        int expected = s.hashCode();
+        graph.getParameter(0).replaceAndDelete(asConstant(graph, s));
+
+        compile(method, graph);
+
+        FixedNode firstFixed = graph.start().next();
+        Assert.assertThat(firstFixed, instanceOf(ReturnNode.class));
+
+        ReturnNode ret = (ReturnNode) firstFixed;
+        JavaConstant result = ret.result().asJavaConstant();
+        if (result == null) {
+            Assert.fail("result not constant: " + ret.result());
+        } else {
+            Assert.assertEquals("result", expected, result.asInt());
+        }
+    }
+
+    public static int parameterizedHashCode(String value) {
+        return value.hashCode();
+    }
+
+    @Test
+    public void test2() {
+        ResolvedJavaMethod method = getResolvedJavaMethod("constantHashCode");
+        StructuredGraph graph = parseForCompile(method);
+
+        FixedNode firstFixed = graph.start().next();
+        Assert.assertThat(firstFixed, instanceOf(ReturnNode.class));
+
+        ReturnNode ret = (ReturnNode) firstFixed;
+        JavaConstant result = ret.result().asJavaConstant();
+        if (result == null) {
+            Assert.fail("result not constant: " + ret.result());
+        } else {
+            int expected = A_CONSTANT_STRING.hashCode();
+            Assert.assertEquals("result", expected, result.asInt());
+        }
+    }
+
+    public static int constantHashCode() {
+        return A_CONSTANT_STRING.hashCode();
+    }
+}