harpoon.IR.Bytecode
Class InMerge

java.lang.Object
  harpoon.IR.Bytecode.Instr
      harpoon.IR.Bytecode.InMerge

All Implemented Interfaces:

HCodeElement, CFGraphable<Instr,harpoon.IR.Bytecode.InstrEdge>, Graph.Node<Instr,harpoon.IR.Bytecode.InstrEdge>, Comparable<Instr>

public class InMerge
extends Instr

InMerge is used to represent a node where multiple control flows merge. These are typically branch targets. An InMerge will have exactly one successor, and multiple predecessors.

Version:

$Id: InMerge.java,v 1.6 2002/04/10 03:04:37 cananian Exp $

Author:

C. Scott Ananian <cananian@alumni.princeton.edu>

See Also:

Instr

Field Summary

Fields inherited from class harpoon.IR.Bytecode.Instr

arrayFactory

Constructor Summary

InMerge(String sourcefile, int linenumber, int arity)
Creates a new InMerge.

Method Summary

int	arity() Return the number of predecessors of this node.
byte	getOpcode() Return the java bytecode of this instruction.
String	toString() Return human-readable representation.

Methods inherited from class harpoon.IR.Bytecode.Instr

compareTo, edgeC, edges, equals, getID, getLineNumber, getSourceFile, hashCode, isPred, isSucc, newEdge, next, next, pred, predC, prev, prev, succ, succC

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

InMerge

public InMerge(String sourcefile,
               int linenumber,
               int arity)

Creates a new InMerge.

Parameters:

arity - the number of predecessors this node will have.

Method Detail

arity

public int arity()

Return the number of predecessors of this node. Exactly equivalent to prev().length but slightly more efficient.

getOpcode

public byte getOpcode()

Return the java bytecode of this instruction. This function is required by the superclass, but not relevant to this function. It returns Op.NOP.

Specified by:

getOpcode in class Instr

toString

public String toString()

Return human-readable representation.

Overrides:

toString in class Object