Mercurial > hg > truffle
diff graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/UnsafeLoadSnippets.java @ 10801:4bfbd4be6e7a
Replace custom graph building with snippet for unsafe load lowering
author | Christos Kotselidis <christos.kotselidis@oracle.com> |
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date | Wed, 17 Jul 2013 20:23:36 +0200 |
parents | |
children | 2c9332a969d6 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/UnsafeLoadSnippets.java Wed Jul 17 20:23:36 2013 +0200 @@ -0,0 +1,65 @@ +/* + * 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.extended.*; +import com.oracle.graal.nodes.spi.*; +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, int disp) { + long displacement = disp + offset; + if (object instanceof java.lang.ref.Reference && referentOffset() == displacement) { + return Word.fromObject(object).readObject((int) displacement, 1, true); + } else { + return Word.fromObject(object).readObject((int) displacement, 0, true); + } + } + + public static class Templates extends AbstractTemplates { + + private final SnippetInfo unsafeLoad = snippet(UnsafeLoadSnippets.class, "lowerUnsafeLoad"); + + public Templates(CodeCacheProvider runtime, Replacements replacements, TargetDescription target) { + super(runtime, replacements, target); + } + + public void lower(UnsafeLoadNode load, @SuppressWarnings("unused") LoweringTool tool) { + Arguments args = new Arguments(unsafeLoad); + args.add("object", load.object()); + args.add("offset", load.offset()); + args.add("disp", load.displacement()); + template(args).instantiate(runtime, load, DEFAULT_REPLACER, args); + } + } +}