Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/FloatingReadNode.java @ 5507:dc71b06d09f8
Moving classes from cri.ri to api.meta.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Thu, 07 Jun 2012 18:24:06 +0200 |
parents | 452f91ebdb54 |
children | 426c605c9d3c |
line wrap: on
line source
/* * 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.extended; import java.util.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.max.cri.ri.*; /** * A floating read of a value from memory specified in terms of an object base and an object relative location. * This node does not null check the object. */ public final class FloatingReadNode extends FloatingAccessNode implements Node.IterableNodeType, LIRLowerable, Canonicalizable { @Input private Node lastLocationAccess; public FloatingReadNode(ValueNode object, LocationNode location, Node lastLocationAccess, Stamp stamp, ValueNode... dependencies) { super(object, location, stamp, dependencies); this.lastLocationAccess = lastLocationAccess; } public FloatingReadNode(ValueNode object, LocationNode location, Node lastLocationAccess, Stamp stamp, List<ValueNode> dependencies) { super(object, location, stamp, dependencies); this.lastLocationAccess = lastLocationAccess; } public Node lastLocationAccess() { return lastLocationAccess; } @Override public void generate(LIRGeneratorTool gen) { gen.setResult(this, gen.emitLoad(gen.makeAddress(location(), object()), getNullCheck())); } @Override public ValueNode canonical(CanonicalizerTool tool) { RiRuntime runtime = tool.runtime(); if (runtime != null && object() != null && object().isConstant() && object().kind() == RiKind.Object) { if (this.location() == LocationNode.FINAL_LOCATION && location().getClass() == LocationNode.class) { Object value = object().asConstant().asObject(); long displacement = location().displacement(); RiKind kind = location().kind(); RiConstant constant = kind.readUnsafeConstant(value, displacement); if (constant != null) { return ConstantNode.forCiConstant(constant, runtime, graph()); } } } return this; } }