Mercurial > hg > graal-jvmci-8
comparison 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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2506:4a3bf8a5bf41 | 2507:9ec15d6914ca |
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1 /* | |
2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 */ | |
23 package com.sun.c1x.ir; | |
24 | |
25 import com.sun.c1x.debug.*; | |
26 import com.sun.cri.bytecode.*; | |
27 import com.sun.cri.ci.*; | |
28 | |
29 /** | |
30 * The {@code CompareOp} instruction represents comparisons such as equals, not equal, etc. | |
31 * | |
32 * @author Ben L. Titzer | |
33 */ | |
34 public final class CompareOp extends Op2 { | |
35 | |
36 /** | |
37 * Creates a new compare operation. | |
38 * @param opcode the bytecode opcode | |
39 * @param kind the result kind | |
40 * @param x the first input | |
41 * @param y the second input | |
42 */ | |
43 public CompareOp(int opcode, CiKind kind, Value x, Value y) { | |
44 super(kind, opcode, x, y); | |
45 if (kind.isVoid()) { | |
46 // A compare that does not produce a value exists soley for it's side effect (i.e. setting condition codes) | |
47 setFlag(Flag.LiveSideEffect); | |
48 } | |
49 } | |
50 | |
51 @Override | |
52 public void accept(ValueVisitor v) { | |
53 v.visitCompareOp(this); | |
54 } | |
55 | |
56 @Override | |
57 public void print(LogStream out) { | |
58 out.print(x()). | |
59 print(' '). | |
60 print(Bytecodes.operator(opcode)). | |
61 print(' '). | |
62 print(y()); | |
63 } | |
64 } |