1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.hotspot;
  24 
  25 import jdk.vm.ci.hotspot.HotSpotVMConfigStore;
  26 
  27 public class AOTGraalHotSpotVMConfig extends GraalHotSpotVMConfig {
  28     private final CompressEncoding aotOopEncoding;
  29     private final CompressEncoding aotKlassEncoding;
  30 
  31     public AOTGraalHotSpotVMConfig(HotSpotVMConfigStore store) {
  32         super(store);
  33         // In AOT, force the shift to be always equal to alignment therefore avoiding zero-shift.
  34         CompressEncoding vmOopEncoding = super.getOopEncoding();
  35         aotOopEncoding = new CompressEncoding(vmOopEncoding.base, vmOopEncoding.alignment, vmOopEncoding.alignment);
  36         CompressEncoding vmKlassEncoding = super.getKlassEncoding();
  37         aotKlassEncoding = new CompressEncoding(vmKlassEncoding.base, vmKlassEncoding.alignment, vmKlassEncoding.alignment);
  38         assert check();
  39     }
  40 
  41     @Override
  42     public CompressEncoding getOopEncoding() {
  43         return aotOopEncoding;
  44     }
  45 
  46     @Override
  47     public CompressEncoding getKlassEncoding() {
  48         return aotKlassEncoding;
  49     }
  50 }