Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/asm/Register.java @ 271:818a18cd69a8
6730514: assertion failure in mangling code when expanding by 0 bytes
Summary: An expansion by 0 bytes was not anticipated when the assertion was composed.
Reviewed-by: jjh, jcoomes, apetrusenko
author | jmasa |
---|---|
date | Wed, 30 Jul 2008 11:54:00 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
line wrap: on
line source
/* * Copyright 2000-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.asm; /** <P> Register is an abstraction over machine registers. </P> <P> FIXME: should align constants with underlying VM code </P> */ public abstract class Register extends ImmediateOrRegister { /** Corresponds to the machine register code. -1 stands for invalid register (initial value). */ protected int number; public Register() { number = -1; } public Register(int number) { this.number = number; } /** Must be overridden by subclass to indicate number of available registers on this platform */ public abstract int getNumberOfRegisters(); public boolean isValid() { return ((0 <= number) && (number <= getNumberOfRegisters())); } public int getNumber() { return number; } public boolean equals(Object x) { if (x == null) { return false; } if (!getClass().equals(x.getClass())) { return false; } Register reg = (Register) x; return (reg.getNumber() == getNumber()); } public int hashCode() { return number; } public boolean isRegister() { return true; } public abstract boolean isStackPointer(); public abstract boolean isFramePointer(); public abstract boolean isFloat(); }