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comparison graal/GraalCompiler/src/com/sun/c1x/ir/CompareOp.java @ 2509:16b9a8b5ad39

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Renamings Runtime=>GraalRuntime and Compiler=>GraalCompiler
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 11:50:44 +0200
parents graal/Compiler/src/com/sun/c1x/ir/CompareOp.java@9ec15d6914ca
children e1b3db8031ee
comparison
equal deleted inserted replaced
2508:fea94949e0a2 2509:16b9a8b5ad39
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 }