org.objectweb.asm.tree.analysis

Class Subroutine

java.lang.Object

org.objectweb.asm.tree.analysis.Subroutine

final class Subroutine
extends java.lang.Object

A method subroutine (corresponds to a JSR instruction).

Field Summary

Fields

Modifier and Type	Field and Description
(package private) java.util.List<JumpInsnNode>	callers The JSR instructions that jump to this subroutine.
(package private) boolean[]	localsUsed The local variables that are read or written by this subroutine.
(package private) LabelNode	start The start of this subroutine.

Constructor Summary

Constructors

Constructor and Description
Subroutine(LabelNode start, int maxLocals, JumpInsnNode caller) Constructs a new Subroutine.
Subroutine(Subroutine subroutine) Constructs a copy of the given Subroutine.

Method Summary

Modifier and Type	Method and Description
boolean	merge(Subroutine subroutine) Merges the given subroutine into this subroutine.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

start

final LabelNode start

The start of this subroutine.

localsUsed

final boolean[] localsUsed

The local variables that are read or written by this subroutine. The i-th element is true if and only if the local variable at index i is read or written by this subroutine.

callers

final java.util.List<JumpInsnNode> callers

The JSR instructions that jump to this subroutine.

Constructor Detail

Subroutine

Subroutine(LabelNode start,
           int maxLocals,
           JumpInsnNode caller)

Constructs a new Subroutine.

Parameters:

start - the start of this subroutine.

maxLocals - the local variables that are read or written by this subroutine.

caller - a JSR instruction that jump to this subroutine.

Subroutine

Subroutine(Subroutine subroutine)

Constructs a copy of the given Subroutine.

Parameters:

subroutine - the subroutine to copy.

Method Detail

merge

public boolean merge(Subroutine subroutine)

Merges the given subroutine into this subroutine. The local variables read or written by the given subroutine are marked as read or written by this one, and the callers of the given subroutine are added as callers of this one (if both have the same start).

Parameters:

subroutine - another subroutine. This subroutine is left unchanged by this method.

Returns:

whether this subroutine has been modified by this method.