Mercurial > hg > graal-jvmci-8
diff graal/Compiler/src/com/sun/c1x/ir/StoreIndexed.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Compiler/src/com/sun/c1x/ir/StoreIndexed.java Wed Apr 27 11:43:22 2011 +0200 @@ -0,0 +1,113 @@ +/* + * 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 static com.sun.c1x.ir.Value.Flag.*; + +import com.sun.c1x.debug.*; +import com.sun.c1x.value.*; +import com.sun.cri.ci.*; + +/** + * The {@code StoreIndexed} instruction represents a write to an array element. + * + * @author Ben L. Titzer + */ +public final class StoreIndexed extends AccessIndexed { + + /** + * The value to store. + */ + Value value; + + /** + * Creates a new StoreIndexed instruction. + * @param array the instruction producing the array + * @param index the instruction producing the index + * @param length the instruction producing the length + * @param elementType the element type + * @param value the value to store into the array + * @param stateBefore the state before executing this instruction + */ + public StoreIndexed(Value array, Value index, Value length, CiKind elementType, Value value, FrameState stateBefore) { + super(CiKind.Void, array, index, length, elementType, stateBefore); + this.value = value; + setFlag(Flag.LiveStore); + if (elementType != CiKind.Object) { + setFlag(Flag.NoWriteBarrier); + } + } + + /** + * Gets the instruction that produces the value that is to be stored into the array. + * @return the value to write into the array + */ + public Value value() { + return value; + } + + /** + * Checks if this instruction needs a write barrier. + * @return {@code true} if this instruction needs a write barrier + */ + public boolean needsWriteBarrier() { + return !checkFlag(Flag.NoWriteBarrier); + } + + /** + * Checks if this instruction needs a store check. + * @return {@code true} if this instruction needs a store check + */ + public boolean needsStoreCheck() { + return !checkFlag(Flag.NoStoreCheck); + } + + public void eliminateStoreCheck() { + clearRuntimeCheck(NoStoreCheck); + } + + /** + * Checks whether this instruction can cause a trap. + * @return {@code true} if this instruction can cause a trap + */ + @Override + public boolean canTrap() { + return super.canTrap() || needsStoreCheck(); + } + + @Override + public void inputValuesDo(ValueClosure closure) { + super.inputValuesDo(closure); + value = closure.apply(value); + } + + @Override + public void accept(ValueVisitor v) { + v.visitStoreIndexed(this); + } + + @Override + public void print(LogStream out) { + out.print(array()).print('[').print(index()).print("] := ").print(value()).print(" (").print(kind.typeChar).print(')'); + } +}