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comparison graal/com.oracle.max.graal.compiler/src/com/sun/c1x/ir/Constant.java @ 2872:0341b6424579

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Project renaming.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 08 Jun 2011 08:42:25 +0200
parents graal/GraalCompiler/src/com/sun/c1x/ir/Constant.java@14708c03abba
children
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2871:d704eb526603 2872:0341b6424579
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 static com.sun.c1x.C1XCompilation.*;
26
27 import com.oracle.graal.graph.*;
28 import com.sun.c1x.debug.*;
29 import com.sun.cri.ci.*;
30 import com.sun.cri.ri.*;
31
32 /**
33 * The {@code Constant} instruction represents a constant such as an integer value,
34 * long, float, object reference, address, etc.
35 */
36 public final class Constant extends FloatingNode {
37
38 private static final int INPUT_COUNT = 0;
39 private static final int SUCCESSOR_COUNT = 0;
40
41 public final CiConstant value;
42
43 /**
44 * Constructs a new instruction representing the specified constant.
45 * @param value the constant
46 * @param graph
47 */
48 public Constant(CiConstant value, Graph graph) {
49 super(value.kind.stackKind(), INPUT_COUNT, SUCCESSOR_COUNT, graph);
50 this.value = value;
51 }
52
53 @Override
54 public void accept(ValueVisitor v) {
55 v.visitConstant(this);
56 }
57
58 /**
59 * Creates an instruction for a double constant.
60 * @param d the double value for which to create the instruction
61 * @param graph
62 * @return an instruction representing the double
63 */
64 public static Constant forDouble(double d, Graph graph) {
65 return new Constant(CiConstant.forDouble(d), graph);
66 }
67
68 /**
69 * Creates an instruction for a float constant.
70 * @param f the float value for which to create the instruction
71 * @return an instruction representing the float
72 */
73 public static Constant forFloat(float f, Graph graph) {
74 return new Constant(CiConstant.forFloat(f), graph);
75 }
76
77 /**
78 * Creates an instruction for an long constant.
79 * @param i the long value for which to create the instruction
80 * @return an instruction representing the long
81 */
82 public static Constant forLong(long i, Graph graph) {
83 return new Constant(CiConstant.forLong(i), graph);
84 }
85
86 /**
87 * Creates an instruction for an integer constant.
88 * @param i the integer value for which to create the instruction
89 * @return an instruction representing the integer
90 */
91 public static Constant forInt(int i, Graph graph) {
92 return new Constant(CiConstant.forInt(i), graph);
93 }
94
95 /**
96 * Creates an instruction for a boolean constant.
97 * @param i the boolean value for which to create the instruction
98 * @return an instruction representing the boolean
99 */
100 public static Constant forBoolean(boolean i, Graph graph) {
101 return new Constant(CiConstant.forBoolean(i), graph);
102 }
103
104 /**
105 * Creates an instruction for an address (jsr/ret address) constant.
106 * @param i the address value for which to create the instruction
107 * @return an instruction representing the address
108 */
109 public static Constant forJsr(int i, Graph graph) {
110 return new Constant(CiConstant.forJsr(i), graph);
111 }
112
113 /**
114 * Creates an instruction for an object constant.
115 * @param o the object value for which to create the instruction
116 * @return an instruction representing the object
117 */
118 public static Constant forObject(Object o, Graph graph) {
119 return new Constant(CiConstant.forObject(o), graph);
120 }
121
122 /**
123 * Creates an instruction for a word constant.
124 * @param val the word value for which to create the instruction
125 * @return an instruction representing the word
126 */
127 public static Constant forWord(long val, Graph graph) {
128 return new Constant(CiConstant.forWord(val), graph);
129 }
130
131 public static Constant defaultForKind(CiKind kind, Graph graph) {
132 switch(kind) {
133 case Boolean:
134 return Constant.forBoolean(false, graph);
135 case Byte:
136 case Char:
137 case Short:
138 case Int:
139 return Constant.forInt(0, graph);
140 case Double:
141 return Constant.forDouble(0.0, graph);
142 case Float:
143 return Constant.forFloat(0.0f, graph);
144 case Long:
145 return Constant.forLong(0L, graph);
146 case Object:
147 return Constant.forObject(null, graph);
148 case Word:
149 return Constant.forWord(0L, graph);
150 default:
151 return null;
152 }
153 }
154
155 @Override
156 public String toString() {
157 return super.toString() + "(" + value + ")";
158 }
159
160 @Override
161 public int valueNumber() {
162 return 0x50000000 | value.hashCode();
163 }
164
165 @Override
166 public boolean valueEqual(Node i) {
167 return i instanceof Constant && ((Constant) i).value.equivalent(this.value);
168 }
169
170 @Override
171 public RiType declaredType() {
172 RiRuntime runtime = compilation().runtime;
173 if (kind.isPrimitive()) {
174 runtime.asRiType(kind);
175 }
176 return runtime.getTypeOf(asConstant());
177 }
178
179 @Override
180 public RiType exactType() {
181 return declaredType();
182 }
183
184 @Override
185 public void print(LogStream out) {
186 out.print(value.valueString());
187 }
188
189 @Override
190 public String shortName() {
191 return value.name();
192 }
193
194 @Override
195 public Node copy(Graph into) {
196 Constant x = new Constant(value, into);
197 return x;
198 }
199 }