Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/cfg/Block.java @ 15145:df2ef5204f2b
Remove AbstractBeginNode, move the framestate from AbstractBeginNode to BeginStateSplitNode.
This required some changes to loop transformations: when peeling don't create duplicates for the exit proxies.
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Mon, 14 Apr 2014 15:21:27 +0200 |
parents | 1bf700e19e84 |
children | f4e31f06b019 |
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/* * Copyright (c) 2009, 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.nodes.cfg; import java.util.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.java.*; public final class Block extends AbstractBlockBase<Block> { protected final BeginNode beginNode; protected FixedNode endNode; protected Loop<Block> loop; protected List<Block> dominated; protected Block postdominator; protected Block(BeginNode node) { this.beginNode = node; } public BeginNode getBeginNode() { return beginNode; } public FixedNode getEndNode() { return endNode; } public Loop<Block> getLoop() { return loop; } public int getLoopDepth() { return loop == null ? 0 : loop.depth; } public boolean isLoopHeader() { return getBeginNode() instanceof LoopBeginNode; } public boolean isLoopEnd() { return getEndNode() instanceof LoopEndNode; } public boolean isExceptionEntry() { return getBeginNode() instanceof ExceptionObjectNode; } public Block getFirstPredecessor() { return predecessors.get(0); } public Block getFirstSuccessor() { return successors.get(0); } public Block getEarliestPostDominated() { Block b = this; while (true) { Block dom = b.getDominator(); if (dom != null && dom.getPostdominator() == b) { b = dom; } else { break; } } return b; } public List<Block> getDominated() { if (dominated == null) { return Collections.emptyList(); } return dominated; } public Block getPostdominator() { return postdominator; } private class NodeIterator implements Iterator<FixedNode> { private FixedNode cur; public NodeIterator() { cur = getBeginNode(); } @Override public boolean hasNext() { return cur != null; } @Override public FixedNode next() { FixedNode result = cur; if (cur == getEndNode()) { cur = null; } else { cur = ((FixedWithNextNode) cur).next(); } assert !(cur instanceof BeginNode); return result; } @Override public void remove() { throw new UnsupportedOperationException(); } } public Iterable<FixedNode> getNodes() { return new Iterable<FixedNode>() { @Override public Iterator<FixedNode> iterator() { return new NodeIterator(); } @Override public String toString() { StringBuilder str = new StringBuilder().append('['); for (FixedNode node : this) { str.append(node).append(", "); } if (str.length() > 1) { str.setLength(str.length() - 2); } return str.append(']').toString(); } }; } @Override public String toString() { return "B" + id; } public boolean dominates(Block block) { return block.isDominatedBy(this); } public boolean isDominatedBy(Block block) { if (block == this) { return true; } if (dominator == null) { return false; } return dominator.isDominatedBy(block); } }