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comparison graal/com.oracle.max.cri/src/com/sun/cri/ci/CiValue.java @ 4169:f5328dda9714

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Initial commit of SSA-based spill-all register assignment
author Christian Wimmer <Christian.Wimmer@Oracle.com>
date Wed, 28 Dec 2011 18:13:25 -0800
parents bc8527f3071c
children de7b3e7ae528
comparison
equal deleted inserted replaced
4168:0bc4815d2069 4169:f5328dda9714
22 */ 22 */
23 package com.sun.cri.ci; 23 package com.sun.cri.ci;
24 24
25 import java.io.*; 25 import java.io.*;
26 26
27
28
29 /** 27 /**
30 * Abstract base class for values manipulated by the compiler. All values have a {@linkplain CiKind kind} and are immutable. 28 * Abstract base class for values manipulated by the compiler. All values have a {@linkplain CiKind kind} and are immutable.
31 */ 29 */
32 public abstract class CiValue implements Serializable { 30 public abstract class CiValue implements Serializable {
33 private static final long serialVersionUID = -6909397188697766469L; 31 private static final long serialVersionUID = -6909397188697766469L;
34 32
35 @SuppressWarnings("serial") 33 @SuppressWarnings("serial")
36 public static CiValue IllegalValue = new CiValue(CiKind.Illegal) { 34 public static CiValue IllegalValue = new CiValue(CiKind.Illegal) {
37 @Override 35 @Override
38 public String name() { 36 public String toString() {
39 return "<illegal>"; 37 return "-";
40 } 38 }
41 @Override 39 @Override
42 public CiRegister asRegister() { 40 public CiRegister asRegister() {
43 return CiRegister.None; 41 return CiRegister.None;
44 }
45 @Override
46 public int hashCode() {
47 return -1;
48 }
49 @Override
50 public boolean equals(Object obj) {
51 return obj == this;
52 }
53 @Override
54 public boolean equalsIgnoringKind(CiValue other) {
55 return other == this;
56 } 42 }
57 }; 43 };
58 44
59 /** 45 /**
60 * The kind of this value. 46 * The kind of this value.
108 94
109 public final boolean isConstant() { 95 public final boolean isConstant() {
110 return this instanceof CiConstant; 96 return this instanceof CiConstant;
111 } 97 }
112 98
113 /** 99 public boolean equalsIgnoringKind(CiValue other) {
114 * Gets a string name for this value without indicating its {@linkplain #kind kind}. 100 // This is a suitable default implementation for several subclasses
115 */ 101 return equals(other);
116 public abstract String name(); 102 }
117 103
118 @Override 104 @Override
119 public abstract boolean equals(Object obj); 105 public abstract String toString();
120 106
121 public abstract boolean equalsIgnoringKind(CiValue other); 107 protected final String kindSuffix() {
122 108 return "|" + kind.typeChar;
123 @Override
124 public abstract int hashCode();
125
126 @Override
127 public final String toString() {
128 return name() + kindSuffix();
129 }
130
131 public final String kindSuffix() {
132 if (kind == CiKind.Illegal) {
133 return "";
134 }
135 return ":" + kind.typeChar;
136 } 109 }
137 110
138 public final boolean isConstant0() { 111 public final boolean isConstant0() {
139 return isConstant() && ((CiConstant) this).asInt() == 0; 112 return isConstant() && ((CiConstant) this).asInt() == 0;
140 } 113 }
141
142 /**
143 * Utility for specializing how a {@linkplain CiValue LIR operand} is formatted to a string.
144 * The {@linkplain Formatter#DEFAULT default formatter} returns the value of
145 * {@link CiValue#toString()}.
146 */
147 public static class Formatter {
148 public static final Formatter DEFAULT = new Formatter();
149
150 /**
151 * Formats a given operand as a string.
152 *
153 * @param operand the operand to format
154 * @return {@code operand} as a string
155 */
156 public String format(CiValue operand) {
157 return operand.toString();
158 }
159 }
160
161 } 114 }