Mercurial > hg > graal-jvmci-8
view graal/GraalCompiler/src/com/sun/c1x/ir/LoadField.java @ 2546:e1b3db8031ee
Removed liveness marking.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 21:54:31 +0200 |
parents | 3fc322165071 |
children | 4a4dab936c1e |
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/* * Copyright (c) 2009, 2011, 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.sun.c1x.ir; import com.sun.c1x.debug.*; import com.sun.c1x.value.*; import com.sun.cri.ci.*; import com.sun.cri.ri.*; /** * The {@code LoadField} instruction represents a read of a static or instance field. */ public final class LoadField extends AccessField { /** * Creates a new LoadField instance. * @param object the receiver object * @param field the compiler interface field * @param isStatic indicates if the field is static * @param stateBefore the state before the field access * @param isLoaded indicates if the class is loaded */ public LoadField(Value object, RiField field, FrameState stateBefore) { super(field.kind().stackKind(), object, field, stateBefore); } /** * Gets the declared type of the field being accessed. * @return the declared type of the field being accessed. */ @Override public RiType declaredType() { return field().type(); } /** * Gets the exact type of the field being accessed. If the field type is * a primitive array or an instance class and the class is loaded and final, * then the exact type is the same as the declared type. Otherwise it is {@code null} * @return the exact type of the field if known; {@code null} otherwise */ @Override public RiType exactType() { RiType declaredType = declaredType(); return declaredType.isResolved() ? declaredType.exactType() : null; } @Override public void accept(ValueVisitor v) { v.visitLoadField(this); } /** * Gets a constant value to which this load can be reduced. * * @return {@code null} if this load cannot be reduced to a constant */ public CiConstant constantValue() { if (isStatic()) { return field.constantValue(null); } else if (object().isConstant()) { CiConstant cons = field.constantValue(object().asConstant()); if (cons != null) { return cons; } return cons; } return null; } @Override public void print(LogStream out) { out.print(object()). print("."). print(field.name()). print(" [field: "). print(CiUtil.format("%h.%n:%t", field, false)). print("]"); } }