Mercurial > hg > truffle
view graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/VirtualStackSlot.java @ 21787:2766fee1809a
Use the fact that a range checked array index is not negative to avoid sign-extension of the index register.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Mon, 08 Jun 2015 19:32:59 +0200 |
parents | 48c1ebd24120 |
children |
line wrap: on
line source
/* * Copyright (c) 2014, 2014, 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.oracle.jvmci.code; import com.oracle.jvmci.meta.LIRKind; /** * {@link VirtualStackSlot}s are stack slots that are not yet fixed to specific frame offset. They * are replaced by real {@link StackSlot}s with a fixed position in the frame before code emission. */ public abstract class VirtualStackSlot extends StackSlotValue { private final int id; public VirtualStackSlot(int id, LIRKind lirKind) { super(lirKind); this.id = id; } public int getId() { return id; } @Override public String toString() { return "vstack:" + id + getKindSuffix(); } @Override public int hashCode() { final int prime = 31; int result = super.hashCode(); result = prime * result + id; return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (!super.equals(obj)) { return false; } if (getClass() != obj.getClass()) { return false; } VirtualStackSlot other = (VirtualStackSlot) obj; if (id != other.id) { return false; } return true; } }