Mercurial > hg > graal-jvmci-8
diff graal/Compiler/src/com/sun/c1x/ir/LoadPointer.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/LoadPointer.java Wed Apr 27 11:43:22 2011 +0200 @@ -0,0 +1,70 @@ +/* + * 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.*; + +/** + * The {@code LoadPointer} instruction represents a read of a pointer. + * This instruction is part of the HIR support for low-level operations, such as safepoints, + * stack banging, etc, and does not correspond to a Java operation. + * + * @author Ben L. Titzer + * @author Doug Simon + */ +public final class LoadPointer extends PointerOp { + + /** + * Creates an instruction for a pointer load. + * + * @param kind the kind of value loaded from the pointer + * @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 + * @see PointerOp#PointerOp(CiKind, int, Value, Value, Value, FrameState, boolean) + */ + public LoadPointer(CiKind kind, int opcode, Value pointer, Value displacement, Value offsetOrIndex, FrameState stateBefore, boolean isVolatile) { + super(kind, kind, opcode, pointer, displacement, offsetOrIndex, stateBefore, isVolatile); + } + + @Override + public void accept(ValueVisitor v) { + v.visitLoadPointer(this); + } + + @Override + public void print(LogStream out) { + out.print("*(").print(pointer()); + if (displacement() == null) { + out.print(" + ").print(offset()); + } else { + out.print(" + ").print(displacement()).print(" + (").print(index()).print(" * sizeOf(" + dataKind + "))"); + } + out.print(")"); + } +}