Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/UnsafeLoadNode.java @ 18187:9619ba4daf4c
Rename Constant to JavaConstant.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Thu, 30 Oct 2014 12:21:07 +0100 |
parents | 45b45f902bed |
children | f57d86eb036f 49e5c062e77a |
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/* * Copyright (c) 2011, 2014, 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.extended; import static com.oracle.graal.compiler.common.UnsafeAccess.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.spi.*; /** * Load of a value from a location specified as an offset relative to an object. No null check is * performed before the load. */ @NodeInfo public class UnsafeLoadNode extends UnsafeAccessNode implements Lowerable, Virtualizable { @OptionalInput(InputType.Condition) LogicNode guardingCondition; public static UnsafeLoadNode create(ValueNode object, ValueNode offset, Kind accessKind, LocationIdentity locationIdentity) { return new UnsafeLoadNode(object, offset, accessKind, locationIdentity); } protected UnsafeLoadNode(ValueNode object, ValueNode offset, Kind accessKind, LocationIdentity locationIdentity) { this(object, offset, accessKind, locationIdentity, null); } public static UnsafeLoadNode create(ValueNode object, ValueNode offset, Kind accessKind, LocationIdentity locationIdentity, LogicNode condition) { return new UnsafeLoadNode(object, offset, accessKind, locationIdentity, condition); } protected UnsafeLoadNode(ValueNode object, ValueNode offset, Kind accessKind, LocationIdentity locationIdentity, LogicNode condition) { super(StampFactory.forKind(accessKind.getStackKind()), object, offset, accessKind, locationIdentity); this.guardingCondition = condition; } public LogicNode getGuardingCondition() { return guardingCondition; } @Override public void lower(LoweringTool tool) { tool.getLowerer().lower(this, tool); } @Override public void virtualize(VirtualizerTool tool) { State state = tool.getObjectState(object()); if (state != null && state.getState() == EscapeState.Virtual) { ValueNode offsetValue = tool.getReplacedValue(offset()); if (offsetValue.isConstant()) { long off = offsetValue.asJavaConstant().asLong(); int entryIndex = state.getVirtualObject().entryIndexForOffset(off); if (entryIndex != -1) { ValueNode entry = state.getEntry(entryIndex); if (entry.getKind() == getKind() || state.getVirtualObject().entryKind(entryIndex) == accessKind()) { tool.replaceWith(entry); } } } } } @Override protected ValueNode cloneAsFieldAccess(ResolvedJavaField field) { return LoadFieldNode.create(object(), field); } @Override protected ValueNode cloneAsArrayAccess(ValueNode location, LocationIdentity identity) { return UnsafeLoadNode.create(object(), location, accessKind(), identity, guardingCondition); } @SuppressWarnings({"unchecked", "unused"}) @NodeIntrinsic public static <T> T load(Object object, long offset, @ConstantNodeParameter Kind kind, @ConstantNodeParameter LocationIdentity locationIdentity) { if (kind == Kind.Boolean) { return (T) (Boolean) unsafe.getBoolean(object, offset); } if (kind == Kind.Byte) { return (T) (Byte) unsafe.getByte(object, offset); } if (kind == Kind.Short) { return (T) (Short) unsafe.getShort(object, offset); } if (kind == Kind.Char) { return (T) (Character) unsafe.getChar(object, offset); } if (kind == Kind.Int) { return (T) (Integer) unsafe.getInt(object, offset); } if (kind == Kind.Float) { return (T) (Float) unsafe.getFloat(object, offset); } if (kind == Kind.Long) { return (T) (Long) unsafe.getLong(object, offset); } if (kind == Kind.Double) { return (T) (Double) unsafe.getDouble(object, offset); } assert kind == Kind.Object; return (T) unsafe.getObject(object, offset); } }