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comparison graal/com.oracle.max.cri/src/com/sun/cri/ci/CiFrame.java @ 4182:de7b3e7ae528

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Simplify CiValue
author Christian Wimmer <Christian.Wimmer@Oracle.com>
date Mon, 02 Jan 2012 14:38:17 -0800
parents bc8527f3071c
children
comparison
equal deleted inserted replaced
4181:319860ae697a 4182:de7b3e7ae528
1 /* 1 /*
2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
30 * Represents the Java bytecode frame state(s) at a given position 30 * Represents the Java bytecode frame state(s) at a given position
31 * including {@link CiValue locations} where to find the local variables, 31 * including {@link CiValue locations} where to find the local variables,
32 * operand stack values and locked objects of the bytecode frame(s). 32 * operand stack values and locked objects of the bytecode frame(s).
33 */ 33 */
34 public class CiFrame extends CiCodePos implements Serializable { 34 public class CiFrame extends CiCodePos implements Serializable {
35 /**
36 *
37 */
38 private static final long serialVersionUID = -345025397165977565L; 35 private static final long serialVersionUID = -345025397165977565L;
39 36
40 /** 37 /**
41 * An array of values representing how to reconstruct the state of the Java frame. 38 * An array of values representing how to reconstruct the state of the Java frame.
42 * This is array is partitioned as follows: 39 * This is array is partitioned as follows:
127 */ 124 */
128 public CiFrame caller() { 125 public CiFrame caller() {
129 return (CiFrame) caller; 126 return (CiFrame) caller;
130 } 127 }
131 128
132 /**
133 * Deep equality test.
134 */
135 @Override
136 public boolean equals(Object obj) {
137 if (obj == this) {
138 return true;
139 }
140 if (obj instanceof CiFrame) {
141 CiFrame other = (CiFrame) obj;
142 return equals(other, false, false);
143 }
144 return false;
145 }
146
147 /**
148 * Deep equality test.
149 *
150 * @param ignoreKinds if {@code true}, compares values but {@link CiValue#equalsIgnoringKind(CiValue) ignore} their kinds
151 * @param ignoreNegativeBCIs if {@code true}, negative BCIs are treated as equal
152 */
153 public boolean equals(CiFrame other, boolean ignoreKinds, boolean ignoreNegativeBCIs) {
154 if ((other.bci == bci || (ignoreNegativeBCIs && other.bci < 0 && bci < 0)) &&
155 numLocals == other.numLocals &&
156 numStack == other.numStack &&
157 numLocks == other.numLocks &&
158 values.length == other.values.length) {
159
160 if (ignoreKinds) {
161 for (int i = 0; i < values.length; i++) {
162 if (!values[i].equalsIgnoringKind(other.values[i])) {
163 return false;
164 }
165 }
166 } else {
167 for (int i = 0; i < values.length; i++) {
168 if (!values[i].equals(other.values[i])) {
169 return false;
170 }
171 }
172 }
173 if (caller == null) {
174 return other.caller == null;
175 }
176 if (other.caller == null) {
177 return false;
178 }
179 return caller().equals(other.caller(), ignoreKinds, ignoreNegativeBCIs);
180 }
181 return false;
182 }
183
184 @Override 129 @Override
185 public String toString() { 130 public String toString() {
186 return CiUtil.append(new StringBuilder(100), this).toString(); 131 return CiUtil.append(new StringBuilder(100), this).toString();
187 } 132 }
188
189 /**
190 * Gets a copy of this frame but with an empty stack.
191 */
192 public CiFrame withEmptyStack() {
193 if (numStack == 0) {
194 return this;
195 }
196 CiValue[] ciValues = new CiValue[numLocals + numLocks];
197 System.arraycopy(this.values, 0, ciValues, 0, numLocals);
198 System.arraycopy(this.values, numLocals + numStack, ciValues, numLocals, numLocks);
199 return new CiFrame(caller(), method, bci, rethrowException, ciValues, numLocals, 0, numLocks);
200 }
201 } 133 }