Mercurial > hg > truffle
view graal/com.oracle.graal.phases/src/com/oracle/graal/phases/graph/ScheduledNodeIterator.java @ 16522:8bba3477c88c
[SPARC] Implementing visitInfopointNode
author | Stefan Anzinger <stefan.anzinger@gmail.com> |
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date | Mon, 14 Jul 2014 05:04:45 -0700 |
parents | 100e196f8728 |
children | c943ba97b2a7 |
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/* * Copyright (c) 2013, 2013, 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.phases.graph; import java.util.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.cfg.*; import com.oracle.graal.phases.schedule.*; /** * Iterates over a list of nodes, which usually comes from * {@link SchedulePhase#getBlockToNodesMap()}. * * While iterating, it is possible to {@link #insert(FixedNode, FixedWithNextNode) insert} and * {@link #replaceCurrent(FixedWithNextNode) replace} nodes. */ public abstract class ScheduledNodeIterator { private FixedWithNextNode lastFixed; private FixedWithNextNode reconnect; private ListIterator<ScheduledNode> iterator; public void processNodes(Block block, SchedulePhase shedule) { lastFixed = block.getBeginNode(); assert lastFixed != null; reconnect = null; iterator = shedule.nodesFor(block).listIterator(); while (iterator.hasNext()) { Node node = iterator.next(); if (!node.isAlive()) { continue; } if (reconnect != null && node instanceof FixedNode) { reconnect.setNext((FixedNode) node); reconnect = null; } if (node instanceof FixedWithNextNode) { lastFixed = (FixedWithNextNode) node; } processNode(node); } if (reconnect != null) { assert block.getSuccessorCount() == 1; reconnect.setNext(block.getFirstSuccessor().getBeginNode()); } } protected void insert(FixedNode start, FixedWithNextNode end) { this.lastFixed.setNext(start); this.lastFixed = end; this.reconnect = end; } protected void replaceCurrent(FixedWithNextNode newNode) { Node current = iterator.previous(); iterator.next(); // needed because of the previous() call current.replaceAndDelete(newNode); insert(newNode, newNode); iterator.set(newNode); } protected abstract void processNode(Node node); }