Mercurial > hg > graal-compiler
view graal/GraalCompiler/src/com/sun/c1x/ir/TableSwitch.java @ 2812:d27bdbec3d67
Removed ArrayLength from CFG. Fixed an issue when scheduling Merge instructions within a block.
If a block only consists of a single Merge instruction, we have to schedule this instruction as the first instruction.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Mon, 30 May 2011 15:24:26 +0200 |
parents | d3fc4fe063bf |
children | bd17ac598c6e |
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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.sun.c1x.ir; import static com.sun.c1x.debug.InstructionPrinter.InstructionLineColumn.*; import java.util.*; import com.oracle.graal.graph.*; import com.sun.c1x.debug.*; /** * The {@code TableSwitch} instruction represents a table switch. */ public final class TableSwitch extends Switch { private static final int INPUT_COUNT = 0; private static final int SUCCESSOR_COUNT = 0; final int lowKey; /** * Constructs a new TableSwitch instruction. * @param value the instruction producing the value being switched on * @param successors the list of successors * @param lowKey the lowest integer key in the table * @param stateAfter the state after the switch * @param graph */ public TableSwitch(Value value, List<? extends Instruction> successors, int lowKey, Graph graph) { super(value, successors, INPUT_COUNT, SUCCESSOR_COUNT, graph); this.lowKey = lowKey; } /** * Gets the lowest key in the table switch (inclusive). * @return the low key */ public int lowKey() { return lowKey; } /** * Gets the highest key in the table switch (exclusive). * @return the high key */ public int highKey() { return lowKey + numberOfCases(); } @Override public void accept(ValueVisitor v) { v.visitTableSwitch(this); } @Override public void print(LogStream out) { out.print("tableswitch "); out.println(value()); int l = numberOfCases(); for (int i = 0; i < l; i++) { INSTRUCTION.advance(out); out.printf("case %5d: B%d%n", lowKey() + i, blockSuccessors().get(i)); } INSTRUCTION.advance(out); out.print("default : ").print(defaultSuccessor()); } }