Mercurial > hg > graal-compiler
view graal/GraalCompiler/src/com/sun/c1x/alloc/Range.java @ 2515:4fdef1464592
Removed extended bytecodes and related HIR instructions.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 15:36:29 +0200 |
parents | 16b9a8b5ad39 |
children |
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/* * Copyright (c) 2009, 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.alloc; /** * Represents a range of integers from a start (inclusive) to an end (exclusive. * * @author Thomas Wuerthinger */ public final class Range { public static final Range EndMarker = new Range(Integer.MAX_VALUE, Integer.MAX_VALUE, null); /** * The start of the range, inclusive. */ public int from; /** * The end of the range, exclusive. */ public int to; /** * A link to allow the range to be put into a singly linked list. */ public Range next; boolean intersects(Range r) { return intersectsAt(r) != -1; } /** * Creates a new range. * * @param from the start of the range, inclusive * @param to the end of the range, exclusive * @param next link to the next range in a linked list */ Range(int from, int to, Range next) { this.from = from; this.to = to; this.next = next; } int intersectsAt(Range r2) { Range r1 = this; assert r2 != null : "null ranges not allowed"; assert r1 != EndMarker && r2 != EndMarker : "empty ranges not allowed"; do { if (r1.from < r2.from) { if (r1.to <= r2.from) { r1 = r1.next; if (r1 == EndMarker) { return -1; } } else { return r2.from; } } else { if (r2.from < r1.from) { if (r2.to <= r1.from) { r2 = r2.next; if (r2 == EndMarker) { return -1; } } else { return r1.from; } } else { // r1.from() == r2.from() if (r1.from == r1.to) { r1 = r1.next; if (r1 == EndMarker) { return -1; } } else { if (r2.from == r2.to) { r2 = r2.next; if (r2 == EndMarker) { return -1; } } else { return r1.from; } } } } } while (true); } @Override public String toString() { return "[" + from + ", " + to + "]"; } }