Mercurial > hg > truffle
view graal/com.oracle.graal.java.decompiler/src/com/oracle/graal/java/decompiler/block/DecompilerBlock.java @ 11329:4f97013c6317
Make TypeCastNode virtualizable.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 16 Aug 2013 18:21:59 +0200 |
parents | 3e34b0318de6 |
children | cbd42807a31f |
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/* * Copyright (c) 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.java.decompiler.block; import java.io.*; import java.util.*; import com.oracle.graal.graph.Node.Verbosity; import com.oracle.graal.java.decompiler.*; import com.oracle.graal.java.decompiler.lines.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.cfg.*; import com.oracle.graal.phases.schedule.*; public abstract class DecompilerBlock { protected final Block block; protected final Decompiler decompiler; protected final List<DecompilerSyntaxLine> code; public DecompilerBlock(Block block, Decompiler decompiler) { this.block = block; this.decompiler = decompiler; this.code = new ArrayList<>(); } public Block getBlock() { return block; } public abstract void printBlock(PrintStream stream, Block codeSuccessor); public final int getPredecessorCount() { return block.getPredecessorCount(); } public abstract int getSuccessorCount(); public abstract boolean contains(Block b); public abstract List<DecompilerBasicBlock> getAllBasicBlocks(); @Override public abstract String toString(); protected void initCode(SchedulePhase schedule) { List<ScheduledNode> instructions = schedule.nodesFor(block); for (ScheduledNode n : instructions) { if (n instanceof MergeNode) { MergeNode merge = (MergeNode) n; for (PhiNode phi : merge.phis()) { addLine(new DecompilerPhiLine(this, phi)); } } else if (n instanceof StartNode || n instanceof BeginNode || n instanceof EndNode || n instanceof LoopEndNode || n instanceof LoopExitNode) { // do nothing } else if (n instanceof ConstantNode) { // do nothing } else if (n instanceof IfNode) { assert n.inputs().count() == 1; addLine(new DecompilerIfLine(this, n, ((IfNode) n).condition())); } else if (n instanceof ReturnNode) { addLine(new DecompilerReturnLine(this, n.inputs().first())); } else if (n instanceof ControlSplitNode) { addLine(new DecompilerControlSplitLine(this, n)); } else if (n instanceof ProxyNode) { ProxyNode proxy = (ProxyNode) n; addLine(new DecompilerProxyLine(this, proxy, proxy.value())); } else if (n instanceof ValueNode) { addLine(new DecompilerAssignmentLine(this, n)); } else { throw new IllegalStateException(n.toString(Verbosity.All) + " " + n.getClass()); } } simplifyCode(); } private void simplifyCode() { for (int i = 0; i < code.size(); i++) { if (code.get(i) instanceof DecompilerAssignmentLine) { if (i + 1 < code.size()) { if (code.get(i + 1) instanceof DecompilerIfLine) { if (code.get(i).getNode().usages().count() == 1) { if (((DecompilerIfLine) code.get(i + 1)).getCondition() == code.get(i).getNode()) { ((DecompilerIfLine) code.get(i + 1)).setMergedCondition((DecompilerAssignmentLine) code.get(i)); code.set(i, null); } } } } } } } protected void addLine(DecompilerSyntaxLine line) { code.add(line); } }