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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 INRIA, France Telecom
 * All rights reserved.
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 *    this software without specific prior written permission.
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package jdk.internal.org.objectweb.asm.tree.analysis;

import java.util.Set;
import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;

A Value which keeps track of the bytecode instructions that can produce it.
Author:Eric Bruneton
/** * A {@link Value} which keeps track of the bytecode instructions that can produce it. * * @author Eric Bruneton */
public class SourceValue implements Value {
The size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.
/** * The size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, * float, object and array types, and 2 for long and double. */
public final int size;
The instructions that can produce this value. For example, for the Java code below, the instructions that can produce the value of i at line 5 are the two ISTORE instructions at line 1 and 3:
1: i = 0;
2: if (...) {
3:   i = 1;
4: }
5: return i;
/** * The instructions that can produce this value. For example, for the Java code below, the * instructions that can produce the value of {@code i} at line 5 are the two ISTORE instructions * at line 1 and 3: * * <pre> * 1: i = 0; * 2: if (...) { * 3: i = 1; * 4: } * 5: return i; * </pre> */
public final Set<AbstractInsnNode> insns;
Constructs a new SourceValue.
Params:
  • size – the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.
/** * Constructs a new {@link SourceValue}. * * @param size the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, * short, int, float, object and array types, and 2 for long and double. */
public SourceValue(final int size) { this(size, new SmallSet<AbstractInsnNode>()); }
Constructs a new SourceValue.
Params:
  • size – the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.
  • insnNode – an instruction that can produce this value.
/** * Constructs a new {@link SourceValue}. * * @param size the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, * short, int, float, object and array types, and 2 for long and double. * @param insnNode an instruction that can produce this value. */
public SourceValue(final int size, final AbstractInsnNode insnNode) { this.size = size; this.insns = new SmallSet<>(insnNode); }
Constructs a new SourceValue.
Params:
  • size – the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.
  • insnSet – the instructions that can produce this value.
/** * Constructs a new {@link SourceValue}. * * @param size the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, * short, int, float, object and array types, and 2 for long and double. * @param insnSet the instructions that can produce this value. */
public SourceValue(final int size, final Set<AbstractInsnNode> insnSet) { this.size = size; this.insns = insnSet; }
Returns the size of this value.
Returns:the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int, float, object and array types, and 2 for long and double.
/** * Returns the size of this value. * * @return the size of this value, in 32 bits words. This size is 1 for byte, boolean, char, * short, int, float, object and array types, and 2 for long and double. */
@Override public int getSize() { return size; } @Override public boolean equals(final Object value) { if (!(value instanceof SourceValue)) { return false; } SourceValue sourceValue = (SourceValue) value; return size == sourceValue.size && insns.equals(sourceValue.insns); } @Override public int hashCode() { return insns.hashCode(); } }