net.sf.jode.flow
Class SpecialBlock

java.lang.Object
  net.sf.jode.flow.StructuredBlock
      net.sf.jode.flow.SpecialBlock

public class SpecialBlock

extends StructuredBlock

This is the structured block for atomic instructions.

Field Summary

static int	DUP
static int	POP
static int	SWAP

Constructor Summary

SpecialBlock(int type, int count, int depth)

Method Summary

boolean	doTransformations() Do simple transformation on the structuredBlock.
void	dumpInstruction(TabbedPrintWriter writer) Print the instruction expressing this structured block.
VariableStack	mapStackToLocal(VariableStack stack) This does take the instr into account and modifies stack accordingly.
boolean	removePop(StructuredBlock last)
void	removePush() This is called after mapStackToLocal to do the stack to local transformation.
boolean	removeSwap(StructuredBlock last)

Methods inherited from class net.sf.jode.flow.StructuredBlock

appendBlock, checkConsistent, contains, copyJump, dumpSource, fillInGenSet, flowMayBeChanged, getDeclarables, getNextBlock, getNextBlock, getNextFlowBlock, getNextFlowBlock, getSubBlocks, isEmpty, isSingleExit, jumpMayBeChanged, makeDeclaration, moveJump, needsBraces, prependBlock, propagateUsage, removeBlock, removeJump, removeOnetimeLocals, replace, replaceSubBlock, setFlowBlock, setJump, setSuccessors, simplify, swapJump, toString

Methods inherited from class java.lang.Object

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

Field Detail

DUP

public static int DUP

SWAP

public static int SWAP

POP

public static int POP

Constructor Detail

SpecialBlock

public SpecialBlock(int type,
                    int count,
                    int depth)

Method Detail

mapStackToLocal

public VariableStack mapStackToLocal(VariableStack stack)

This does take the instr into account and modifies stack accordingly. It then calls super.mapStackToLocal.

Overrides:

mapStackToLocal in class StructuredBlock

Parameters:

stack - the stack before the instruction is called

Returns:

stack the stack afterwards.

removePush

public void removePush()

Description copied from class: StructuredBlock

This is called after mapStackToLocal to do the stack to local transformation.

Overrides:

removePush in class StructuredBlock

dumpInstruction

public void dumpInstruction(TabbedPrintWriter writer)
                     throws java.io.IOException

Description copied from class: StructuredBlock

Print the instruction expressing this structured block.

Specified by:

dumpInstruction in class StructuredBlock

Parameters:

writer - The tabbed print writer, where we print to.

Throws:

java.io.IOException

doTransformations

public boolean doTransformations()

Description copied from class: StructuredBlock

Do simple transformation on the structuredBlock.

Overrides:

doTransformations in class StructuredBlock

Returns:

true, if some transformation was done.

removeSwap

public boolean removeSwap(StructuredBlock last)

removePop

public boolean removePop(StructuredBlock last)