Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.loop/src/com/oracle/graal/compiler/loop/InductionVariable.java @ 6522:c612043278e9
refactoring: graal.compiler.phases -> graal.phases, graal.compiler.virtual -> graal.virtual, graal.compiler.loop -> graal.loop
author | Doug Simon <doug.simon@oracle.com> |
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date | Sun, 07 Oct 2012 12:44:05 +0200 |
parents | graal/com.oracle.graal.compiler.loop/src/com/oracle/graal/compiler/loop/InductionVariable.java@033f95af9cd7 |
children |
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/* * Copyright (c) 2012, 2012, 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.graal.compiler.loop; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; public abstract class InductionVariable { public enum Direction { Up, Down; public Direction opposite() { switch(this) { case Up: return Down; case Down: return Up; default: throw GraalInternalError.shouldNotReachHere(); } } } protected final LoopEx loop; public InductionVariable(LoopEx loop) { this.loop = loop; } public abstract Direction direction(); public abstract ValueNode valueNode(); public abstract ValueNode initNode(); public abstract ValueNode strideNode(); public abstract boolean isConstantInit(); public abstract boolean isConstantStride(); public abstract long constantInit(); public abstract long constantStride(); public abstract ValueNode extremumNode(); public abstract boolean isConstantExtremum(); public abstract long constantExtremum(); }