Mercurial > hg > truffle
diff graal/Compiler/src/com/sun/c1x/lir/LIRTableSwitch.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
---|---|
date | Wed, 27 Apr 2011 11:43:22 +0200 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Compiler/src/com/sun/c1x/lir/LIRTableSwitch.java Wed Apr 27 11:43:22 2011 +0200 @@ -0,0 +1,89 @@ +/* + * 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.lir; + +import com.sun.c1x.ir.*; +import com.sun.cri.ci.*; + +/** + * @author Doug Simon + */ +public class LIRTableSwitch extends LIRInstruction { + + public BlockBegin defaultTarget; + + public final BlockBegin[] targets; + + public final int lowKey; + + public LIRTableSwitch(CiValue value, int lowKey, BlockBegin defaultTarget, BlockBegin[] targets) { + super(LIROpcode.TableSwitch, CiValue.IllegalValue, null, false, 1, 0, value); + this.lowKey = lowKey; + this.targets = targets; + this.defaultTarget = defaultTarget; + } + + @Override + public void emitCode(LIRAssembler masm) { + masm.emitTableSwitch(this); + } + + /** + * @return the input value to this switch + */ + public CiValue value() { + return operand(0); + } + + @Override + public String operationString(OperandFormatter operandFmt) { + StringBuilder buf = new StringBuilder(super.operationString(operandFmt)); + buf.append("\ndefault: [B").append(defaultTarget.blockID).append(']'); + int key = lowKey; + for (BlockBegin b : targets) { + buf.append("\ncase ").append(key).append(": [B").append(b.blockID).append(']'); + key++; + } + return buf.toString(); + } + + private BlockBegin substitute(BlockBegin block, BlockBegin oldBlock, BlockBegin newBlock) { + if (block == oldBlock) { + LIRInstruction instr = newBlock.lir().instructionsList().get(0); + assert instr instanceof LIRLabel : "first instruction of block must be label"; + return newBlock; + } + return oldBlock; + } + + public void substitute(BlockBegin oldBlock, BlockBegin newBlock) { + if (substitute(defaultTarget, oldBlock, newBlock) == newBlock) { + defaultTarget = newBlock; + } + for (int i = 0; i < targets.length; i++) { + if (substitute(targets[i], oldBlock, newBlock) == newBlock) { + targets[i] = newBlock; + } + } + } +}