--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.lir.jtt/src/org/graalvm/compiler/lir/jtt/ConstantStackCastTest.java	2016-12-09 00:53:47.302685208 -0800
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2015, 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.lir.jtt;
+
+import static org.graalvm.compiler.lir.LIRValueUtil.asJavaConstant;
+import static org.graalvm.compiler.lir.LIRValueUtil.isJavaConstant;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import org.graalvm.compiler.core.common.LIRKind;
+import org.graalvm.compiler.debug.GraalError;
+import org.graalvm.compiler.lir.ConstantValue;
+import org.graalvm.compiler.lir.VirtualStackSlot;
+import org.graalvm.compiler.lir.framemap.FrameMapBuilder;
+import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
+
+import jdk.vm.ci.meta.JavaConstant;
+import jdk.vm.ci.meta.JavaKind;
+import jdk.vm.ci.meta.PlatformKind;
+import jdk.vm.ci.meta.Value;
+
+/**
+ * Tests move from a constant to a wider stack slot (e.g. byte constant to integer stack slot).
+ */
+public class ConstantStackCastTest extends LIRTest {
+    private static PlatformKind byteKind;
+    private static final LoadConstantStackSpec stackCopyByte = new LoadConstantStackSpec();
+
+    @Before
+    public void setup() {
+        // Necessary to get the PlatformKind on which we're currently running on
+        byteKind = getBackend().getTarget().arch.getPlatformKind(JavaKind.Byte);
+        stackCopyByte.dstKind = LIRKind.fromJavaKind(getBackend().getTarget().arch, JavaKind.Int);
+        stackCopyByte.srcKind = LIRKind.fromJavaKind(getBackend().getTarget().arch, JavaKind.Byte);
+    }
+
+    private static class LoadConstantStackSpec extends LIRTestSpecification {
+        LIRKind dstKind;
+        LIRKind srcKind;
+
+        @Override
+        public void generate(LIRGeneratorTool gen, Value value) {
+            FrameMapBuilder frameMapBuilder = gen.getResult().getFrameMapBuilder();
+            // create slots
+            VirtualStackSlot s1 = frameMapBuilder.allocateSpillSlot(dstKind);
+            // move stuff around
+            Value srcValue;
+            if (isJavaConstant(value)) {
+                srcValue = getConstant(srcKind, asJavaConstant(value));
+            } else {
+                srcValue = value;
+            }
+            gen.emitMove(s1, srcValue);
+            gen.emitBlackhole(s1);
+            setResult(gen.emitMove(s1));
+        }
+
+        private static ConstantValue getConstant(LIRKind srcKind, JavaConstant c) {
+            if (srcKind.getPlatformKind() == byteKind) {
+                JavaConstant byteConst = JavaConstant.forByte((byte) c.asInt());
+                return new ConstantValue(srcKind, byteConst);
+            } else {
+                throw GraalError.shouldNotReachHere("Kind not supported: " + srcKind);
+            }
+        }
+
+    }
+
+    @LIRIntrinsic
+    public static byte testCopyByte(@SuppressWarnings("unused") LoadConstantStackSpec spec, byte value) {
+        return value;
+    }
+
+    public byte testByte(byte value) {
+        return testCopyByte(stackCopyByte, value);
+    }
+
+    @Test
+    public void runByte() throws Throwable {
+        runTest("testByte", (byte) 0);
+    }
+
+}