Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/ControlSplitNode.java @ 5698:764db9ada24f
rework of switch operations: unify lookup- and tableswitch, introduce switch lir instructions
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 27 Jun 2012 11:51:18 +0200 |
parents | 493e8d932148 |
children | 3b8bc07f8d17 |
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/* * Copyright (c) 2009, 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.graal.nodes; import java.util.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.type.*; /** * The {@code ControlSplitNode} is a base class for all instructions that split the control flow (ie. have more than one successor). */ public abstract class ControlSplitNode extends FixedNode { @Successor private final NodeSuccessorList<BeginNode> blockSuccessors; protected double[] branchProbability; public BeginNode blockSuccessor(int index) { return blockSuccessors.get(index); } public void setBlockSuccessor(int index, BeginNode x) { blockSuccessors.set(index, x); } public int blockSuccessorCount() { return blockSuccessors.size(); } public ControlSplitNode(Stamp stamp, BeginNode[] blockSuccessors, double[] branchProbability) { super(stamp); assert branchProbability.length == blockSuccessors.length; this.blockSuccessors = new NodeSuccessorList<>(this, blockSuccessors); this.branchProbability = branchProbability; } public double probability(int successorIndex) { return branchProbability[successorIndex]; } public void setProbability(int successorIndex, double x) { branchProbability[successorIndex] = x; } public Iterable<BeginNode> blockSuccessors() { return new Iterable<BeginNode>() { @Override public Iterator<BeginNode> iterator() { return new Iterator<BeginNode>() { int i = 0; @Override public void remove() { throw new UnsupportedOperationException(); } @Override public BeginNode next() { return ControlSplitNode.this.blockSuccessor(i++); } @Override public boolean hasNext() { return i < ControlSplitNode.this.blockSuccessorCount(); } }; } }; } @Override public Map<Object, Object> getDebugProperties() { Map<Object, Object> properties = super.getDebugProperties(); StringBuilder str = new StringBuilder(); for (int i = 0; i < branchProbability.length; i++) { str.append(i == 0 ? "" : ", ").append(String.format(Locale.ENGLISH, "%7.5f", branchProbability[i])); } properties.put("branchProbability", str.toString()); return properties; } public int blockSuccessorIndex(BeginNode successor) { int idx = blockSuccessors.indexOf(successor); if (idx < 0) { throw new IllegalArgumentException(); } return idx; } @Override public ControlSplitNode clone(Graph into) { ControlSplitNode csn = (ControlSplitNode) super.clone(into); csn.branchProbability = Arrays.copyOf(branchProbability, branchProbability.length); return csn; } }