harpoon.IR.Bytecode
Class InCti

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

All Implemented Interfaces:

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

Direct Known Subclasses:

InRet, InSwitch

public class InCti
extends Instr

InCti is used for control-transfer instructions. It will have exactly one predecessor, and multiple successors. For conditional branches, the first successor (next()[0]) will be the 'fall-through' instruction (corresponding to branch-not-taken). For unconditional branches, the first successor will be the target, if there is one. Instructions like ireturn have no successors.

Version:

$Id: InCti.java,v 1.3 2002/02/25 21:04:17 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

InCti(String sourcefile, int linenumber, byte[] code, int pc)
Create an InCti from a chunk of bytecode starting at offest pc.

Method Summary

byte	getOpcode() Return the java bytecode opcode of this instruction.
String	toString() Return human-readable instruction string.

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

InCti

public InCti(String sourcefile,
             int linenumber,
             byte[] code,
             int pc)

Create an InCti from a chunk of bytecode starting at offest pc.

Method Detail

getOpcode

public byte getOpcode()

Return the java bytecode opcode of this instruction.

Specified by:

getOpcode in class Instr

toString

public String toString()

Return human-readable instruction string.

Overrides:

toString in class Object