--- old/src/java.base/share/classes/sun/security/provider/SHA.java	2015-06-26 17:30:27.361117309 +0200
+++ new/src/java.base/share/classes/sun/security/provider/SHA.java	2015-06-26 17:30:26.605117288 +0200
@@ -25,7 +25,10 @@
 
 package sun.security.provider;
 
+import java.util.Objects;
+
 import static sun.security.provider.ByteArrayAccess.*;
+import jdk.internal.HotSpotIntrinsicCandidate;
 
 /**
  * This class implements the Secure Hash Algorithm (SHA) developed by
@@ -114,8 +117,27 @@
      * "old" NIST Secure Hash Algorithm.
      */
     void implCompress(byte[] buf, int ofs) {
-        b2iBig64(buf, ofs, W);
+	implCompressCheck(buf, ofs);
+	implCompress0(buf, ofs);
+    }
+
+    private void implCompressCheck(byte[] buf, int ofs) {
+	Objects.requireNonNull(buf);
+
+	// The checks performed by the method 'b2iBig64'
+	// are sufficient for the case when the method
+	// 'implCompressImpl' is replaced with a compiler
+	// intrinsic.
+	b2iBig64(buf, ofs, W);
+    }
 
+    // The method 'implCompressImpl seems not to use its parameters.
+    // The method can, however, be replaced with a compiler intrinsic
+    // that operates directly on the array 'buf' (starting from
+    // offset 'ofs') and not on array 'W', therefore 'buf' and 'ofs'
+    // must be passed as parameter the method.
+    @HotSpotIntrinsicCandidate
+    private void implCompress0(byte[] buf, int ofs) {
         // The first 16 ints have the byte stream, compute the rest of
         // the buffer
         for (int t = 16; t <= 79; t++) {