Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/ReadNode.java @ 5698:764db9ada24f
rework of switch operations: unify lookup- and tableswitch, introduce switch lir instructions
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 27 Jun 2012 11:51:18 +0200 |
parents | 8f9c9d372e31 |
children | 12e5956a8fdd |
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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.extended; import com.oracle.graal.api.code.*; 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.*; public final class ReadNode extends AccessNode implements Node.IterableNodeType, LIRLowerable, Canonicalizable { public ReadNode(ValueNode object, LocationNode location, Stamp stamp) { super(object, location, stamp); } @Override public void generate(LIRGeneratorTool gen) { gen.setResult(this, gen.emitLoad(gen.makeAddress(location(), object()), getNullCheck())); } @Override public ValueNode canonical(CanonicalizerTool tool) { CodeCacheProvider runtime = tool.runtime(); if (runtime != null && object() != null && object().isConstant() && object().kind() == Kind.Object) { if (location() == LocationNode.FINAL_LOCATION && location().getClass() == LocationNode.class) { Object value = object().asConstant().asObject(); long displacement = location().displacement(); Kind kind = location().kind(); Constant constant = kind.readUnsafeConstant(value, displacement); if (constant != null) { return ConstantNode.forConstant(constant, runtime, graph()); } } } return this; } }