Mercurial > hg > graal-compiler
view graal/GraalCompiler/src/com/sun/c1x/ir/PointerOp.java @ 2509:16b9a8b5ad39
Renamings Runtime=>GraalRuntime and Compiler=>GraalCompiler
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:50:44 +0200 |
parents | graal/Compiler/src/com/sun/c1x/ir/PointerOp.java@9ec15d6914ca |
children |
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/* * Copyright (c) 2010, 2010, 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.value.*; import com.sun.cri.ci.*; /** * The base class for pointer access operations. * * @author Doug Simon */ public abstract class PointerOp extends StateSplit { /** * The kind of value at the address accessed by the pointer operation. */ public final CiKind dataKind; public final int opcode; protected Value pointer; protected Value displacement; protected Value offsetOrIndex; protected final boolean isVolatile; final boolean isPrefetch; /** * Creates an instruction for a pointer operation. If {@code displacement != null}, the effective of the address of the operation is * computed as the pointer plus a byte displacement plus a scaled index. Otherwise, the effective address is computed as the * pointer plus a byte offset. * * @param kind the kind of value produced by this operation * @param dataKind the kind of value at the address accessed by the pointer operation * @param opcode the opcode of the instruction * @param pointer the value producing the pointer * @param displacement the value producing the displacement. This may be {@code null}. * @param offsetOrIndex the value producing the scaled-index or the byte offset depending on whether {@code displacement} is {@code null} * @param stateBefore the state before * @param isVolatile {@code true} if the access is volatile */ public PointerOp(CiKind kind, CiKind dataKind, int opcode, Value pointer, Value displacement, Value offsetOrIndex, FrameState stateBefore, boolean isVolatile) { super(kind.stackKind(), stateBefore); this.opcode = opcode; this.pointer = pointer; this.dataKind = dataKind; this.displacement = displacement; this.offsetOrIndex = offsetOrIndex; this.isVolatile = isVolatile; this.isPrefetch = false; if (pointer.isNonNull()) { eliminateNullCheck(); } } public Value pointer() { return pointer; } public Value index() { return offsetOrIndex; } public Value offset() { return offsetOrIndex; } public Value displacement() { return displacement; } @Override public void runtimeCheckCleared() { clearState(); } /** * Checks whether this field access may cause a trap or an exception, which * is if it either requires a null check or needs patching. * @return {@code true} if this field access can cause a trap */ @Override public boolean canTrap() { return needsNullCheck(); } /** * Iterates over the input values to this instruction. * @param closure the closure to apply to each value */ @Override public void inputValuesDo(ValueClosure closure) { pointer = closure.apply(pointer); offsetOrIndex = closure.apply(offsetOrIndex); if (displacement != null) { displacement = closure.apply(displacement); } } }