Mercurial > hg > graal-jvmci-8
annotate graal/Compiler/src/com/sun/c1x/ir/CompareOp.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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1 /* |
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2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.sun.c1x.ir; |
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24 |
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25 import com.sun.c1x.debug.*; |
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26 import com.sun.cri.bytecode.*; |
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27 import com.sun.cri.ci.*; |
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28 |
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29 /** |
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30 * The {@code CompareOp} instruction represents comparisons such as equals, not equal, etc. |
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31 * |
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32 * @author Ben L. Titzer |
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33 */ |
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34 public final class CompareOp extends Op2 { |
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35 |
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36 /** |
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37 * Creates a new compare operation. |
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38 * @param opcode the bytecode opcode |
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39 * @param kind the result kind |
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40 * @param x the first input |
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41 * @param y the second input |
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42 */ |
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43 public CompareOp(int opcode, CiKind kind, Value x, Value y) { |
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44 super(kind, opcode, x, y); |
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45 if (kind.isVoid()) { |
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46 // A compare that does not produce a value exists soley for it's side effect (i.e. setting condition codes) |
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47 setFlag(Flag.LiveSideEffect); |
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48 } |
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49 } |
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50 |
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51 @Override |
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52 public void accept(ValueVisitor v) { |
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53 v.visitCompareOp(this); |
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54 } |
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55 |
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56 @Override |
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57 public void print(LogStream out) { |
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58 out.print(x()). |
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59 print(' '). |
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60 print(Bytecodes.operator(opcode)). |
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61 print(' '). |
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62 print(y()); |
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63 } |
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64 } |