--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/replacements/SHA2Substitutions.java	Thu Feb 16 15:46:09 2017 -0800
@@ -0,0 +1,70 @@
+/*
+ * 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.hotspot.replacements;
+
+import static org.graalvm.compiler.core.common.util.Util.Java8OrEarlier;
+import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayBaseOffset;
+
+import org.graalvm.compiler.api.replacements.ClassSubstitution;
+import org.graalvm.compiler.api.replacements.MethodSubstitution;
+import org.graalvm.compiler.core.common.LocationIdentity;
+import org.graalvm.compiler.debug.GraalError;
+import org.graalvm.compiler.hotspot.HotSpotBackend;
+import org.graalvm.compiler.hotspot.nodes.ComputeObjectAddressNode;
+import org.graalvm.compiler.nodes.PiNode;
+import org.graalvm.compiler.nodes.extended.UnsafeLoadNode;
+import org.graalvm.compiler.word.Word;
+
+import jdk.vm.ci.meta.JavaKind;
+
+@ClassSubstitution(className = "sun.security.provider.SHA2", optional = true)
+public class SHA2Substitutions {
+
+    static final long stateOffset;
+
+    static final Class<?> shaClass;
+
+    public static final String implCompressName = Java8OrEarlier ? "implCompress" : "implCompress0";
+
+    static {
+        try {
+            // Need to use the system class loader as com.sun.crypto.provider.AESCrypt
+            // is normally loaded by the extension class loader which is not delegated
+            // to by the JVMCI class loader.
+            ClassLoader cl = ClassLoader.getSystemClassLoader();
+            shaClass = Class.forName("sun.security.provider.SHA2", true, cl);
+            stateOffset = UnsafeAccess.UNSAFE.objectFieldOffset(shaClass.getDeclaredField("state"));
+        } catch (Exception ex) {
+            throw new GraalError(ex);
+        }
+    }
+
+    @MethodSubstitution(isStatic = false)
+    static void implCompress0(Object receiver, byte[] buf, int ofs) {
+        Object realReceiver = PiNode.piCastNonNull(receiver, shaClass);
+        Object state = UnsafeLoadNode.load(realReceiver, stateOffset, JavaKind.Object, LocationIdentity.any());
+        Word bufAddr = Word.unsigned(ComputeObjectAddressNode.get(buf, getArrayBaseOffset(JavaKind.Byte) + ofs));
+        Word stateAddr = Word.unsigned(ComputeObjectAddressNode.get(state, getArrayBaseOffset(JavaKind.Int)));
+        HotSpotBackend.sha2ImplCompressStub(bufAddr, stateAddr);
+    }
+}