Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/UnsafeLoadSnippets.java @ 14945:b14cb2d9253d
Make compression and uncompression explicit in the high level graph.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Wed, 02 Apr 2014 15:26:58 +0200 |
parents | 75a67ebd50e8 |
children | db4254246f9a |
line wrap: on
line source
/* * Copyright (c) 2013, 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 com.oracle.graal.hotspot.replacements; import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*; import static com.oracle.graal.replacements.SnippetTemplate.*; import com.oracle.graal.api.code.*; import com.oracle.graal.nodes.HeapAccess.BarrierType; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.phases.util.*; import com.oracle.graal.replacements.*; import com.oracle.graal.replacements.SnippetTemplate.AbstractTemplates; import com.oracle.graal.replacements.SnippetTemplate.Arguments; import com.oracle.graal.replacements.SnippetTemplate.SnippetInfo; import com.oracle.graal.word.*; public class UnsafeLoadSnippets implements Snippets { @Snippet public static Object lowerUnsafeLoad(Object object, long offset) { Object fixedObject = FixedValueAnchorNode.getObject(object); if (object instanceof java.lang.ref.Reference && referentOffset() == offset) { return Word.fromObject(fixedObject).readObject((int) offset, BarrierType.PRECISE); } else { return Word.fromObject(fixedObject).readObject((int) offset, BarrierType.NONE); } } public static class Templates extends AbstractTemplates { private final SnippetInfo unsafeLoad = snippet(UnsafeLoadSnippets.class, "lowerUnsafeLoad"); public Templates(Providers providers, TargetDescription target) { super(providers, target); } public void lower(UnsafeLoadNode load, LoweringTool tool) { Arguments args = new Arguments(unsafeLoad, load.graph().getGuardsStage(), tool.getLoweringStage()); args.add("object", load.object()); args.add("offset", load.offset()); template(args).instantiate(providers.getMetaAccess(), load, DEFAULT_REPLACER, args); } } }