Mercurial > hg > graal-compiler
view graal/com.oracle.max.graal.nodes/src/com/oracle/max/graal/nodes/LoopBeginNode.java @ 4411:cd2b68ef8e23
cleanup around filter and predicates :
remove duplicate compiler.util.NodeIterators
add contains to NodeIterable
support isNotA(Class).nor(Class) filtering
support filtering on interfaces
remove and/or(Class) from FilteredNodeIterable replace with isA(Class).or(Class)
lower the cost on extending NodeIterable (remove the until field)
NodeList is a NodeIterable
Use NodeIterable functions where possible
author | Gilles Duboscq <duboscq@ssw.jku.at> |
---|---|
date | Mon, 30 Jan 2012 13:06:11 +0100 |
parents | 982c986bb628 |
children | a3882fd1ae61 |
line wrap: on
line source
/* * Copyright (c) 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.oracle.max.graal.nodes; import java.util.*; import com.oracle.max.graal.graph.*; import com.oracle.max.graal.nodes.spi.*; public class LoopBeginNode extends MergeNode implements Node.IterableNodeType, LIRLowerable { private double loopFrequency; public LoopBeginNode() { loopFrequency = 1; } public double loopFrequency() { return loopFrequency; } public void setLoopFrequency(double loopFrequency) { this.loopFrequency = loopFrequency; } public LoopEndNode loopEnd() { return usages().filter(LoopEndNode.class).first(); } @Override public void generate(LIRGeneratorTool gen) { // Nothing to emit, since this is node is used for structural purposes only. } @Override public int phiPredecessorCount() { return endCount() + 1; } @Override public int phiPredecessorIndex(FixedNode pred) { if (pred == forwardEdge()) { return 0; } else if (pred == this.loopEnd()) { return 1; } throw ValueUtil.shouldNotReachHere("unknown pred : " + pred + "(sp=" + forwardEdge() + ", le=" + this.loopEnd() + ")"); } @Override public FixedNode phiPredecessorAt(int index) { if (index == 0) { return forwardEdge(); } else if (index == 1) { return loopEnd(); } throw ValueUtil.shouldNotReachHere(); } public EndNode forwardEdge() { return this.endAt(0); } @Override public boolean verify() { assertTrue(loopEnd() != null, "missing loopEnd"); assertTrue(forwardEdge() != null, "missing forwardEdge"); assertTrue(usages().filter(LoopEndNode.class).count() == 1, "multiple loop ends"); return super.verify(); } @Override public Map<Object, Object> getDebugProperties() { Map<Object, Object> properties = super.getDebugProperties(); properties.put("loopFrequency", String.format("%7.1f", loopFrequency)); return properties; } }