Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualArrayNode.java @ 7765:f20c2b1f5289
fix for Object.clone virtualization
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Mon, 11 Feb 2013 10:44:40 +0100 |
parents | 77c86cf33685 |
children | 7828409c364c |
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/* * Copyright (c) 2011, 2012, 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.nodes.virtual; import sun.misc.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.spi.*; @NodeInfo(nameTemplate = "VirtualArray {p#componentType/s}[{p#length}]") public class VirtualArrayNode extends VirtualObjectNode { private final ResolvedJavaType componentType; private final int length; public VirtualArrayNode(ResolvedJavaType componentType, int length) { this.componentType = componentType; this.length = length; } @Override public ResolvedJavaType type() { return componentType.getArrayClass(); } public ResolvedJavaType componentType() { return componentType; } @Override public int entryCount() { return length; } @Override public void generate(LIRGeneratorTool gen) { // nothing to do... } @Override public String toString(Verbosity verbosity) { if (verbosity == Verbosity.Name) { return super.toString(Verbosity.Name) + " " + componentType.getName() + "[" + length + "]"; } else { return super.toString(verbosity); } } @Override public String fieldName(int index) { return "[" + index + "]"; } @Override public int entryIndexForOffset(long constantOffset) { int baseOffset; int indexScale; switch (componentType.getKind()) { case Boolean: baseOffset = Unsafe.ARRAY_BOOLEAN_BASE_OFFSET; indexScale = Unsafe.ARRAY_BOOLEAN_INDEX_SCALE; break; case Byte: baseOffset = Unsafe.ARRAY_BYTE_BASE_OFFSET; indexScale = Unsafe.ARRAY_BYTE_INDEX_SCALE; break; case Short: baseOffset = Unsafe.ARRAY_SHORT_BASE_OFFSET; indexScale = Unsafe.ARRAY_SHORT_INDEX_SCALE; break; case Char: baseOffset = Unsafe.ARRAY_CHAR_BASE_OFFSET; indexScale = Unsafe.ARRAY_CHAR_INDEX_SCALE; break; case Int: baseOffset = Unsafe.ARRAY_INT_BASE_OFFSET; indexScale = Unsafe.ARRAY_INT_INDEX_SCALE; break; case Long: baseOffset = Unsafe.ARRAY_LONG_BASE_OFFSET; indexScale = Unsafe.ARRAY_LONG_INDEX_SCALE; break; case Float: baseOffset = Unsafe.ARRAY_FLOAT_BASE_OFFSET; indexScale = Unsafe.ARRAY_FLOAT_INDEX_SCALE; break; case Double: baseOffset = Unsafe.ARRAY_DOUBLE_BASE_OFFSET; indexScale = Unsafe.ARRAY_DOUBLE_INDEX_SCALE; break; case Object: baseOffset = Unsafe.ARRAY_OBJECT_BASE_OFFSET; indexScale = Unsafe.ARRAY_OBJECT_INDEX_SCALE; break; default: return -1; } long index = constantOffset - baseOffset; if (index % indexScale != 0) { return -1; } long elementIndex = index / indexScale; if (elementIndex < 0 || elementIndex >= length) { return -1; } return (int) elementIndex; } @Override public Kind entryKind(int index) { assert index >= 0 && index < length; return componentType.getKind(); } @Override public VirtualArrayNode duplicate() { return new VirtualArrayNode(componentType, length); } }