net.sf.jode.flow
Class InstructionBlock

java.lang.Object
  net.sf.jode.flow.StructuredBlock
      net.sf.jode.flow.InstructionContainer
          net.sf.jode.flow.InstructionBlock

public class InstructionBlock
extends InstructionContainer

This is the structured block for atomic instructions.

Constructor Summary

InstructionBlock(Expression instr)

InstructionBlock(Instruction bytecodeInstr, Expression instr)

Method Summary

void	checkDeclaration(Set declareSet) Check if this is an local store instruction to a not yet declared variable.
void	dumpInstruction(TabbedPrintWriter writer) Print the instruction expressing this structured block.
void	makeDeclaration(Set done) Make the declarations, i.e.
VariableStack	mapStackToLocal(VariableStack stack) This does take the instr into account and modifies stack accordingly.
boolean	needsBraces() Tells if this block needs braces when used in a if or while block.
void	removePush() This is called after mapStackToLocal to do the stack to local transformation.

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

doTransformations, fillInGenSet, getDeclarables, getInstruction, removeOnetimeLocals, setInstruction, simplify

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

appendBlock, checkConsistent, contains, copyJump, dumpSource, flowMayBeChanged, getBCELInstructions, getBytecodeInstructions, getNextBlock, getNextBlock, getNextFlowBlock, getNextFlowBlock, getSubBlocks, isEmpty, isSingleExit, jumpMayBeChanged, moveJump, prependBlock, propagateUsage, removeBlock, removeJump, replace, replaceSubBlock, setFlowBlock, setJump, setSuccessors, swapJump, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

InstructionBlock

public InstructionBlock(Expression instr)

InstructionBlock

public InstructionBlock(Instruction bytecodeInstr,
                        Expression instr)

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

needsBraces

public boolean needsBraces()

Tells if this block needs braces when used in a if or while block.

Overrides:

needsBraces in class StructuredBlock

Returns:

true if this block should be sorrounded by braces.

checkDeclaration

public void checkDeclaration(Set declareSet)

Check if this is an local store instruction to a not yet declared variable. In that case mark this as declaration and return the variable.

makeDeclaration

public void makeDeclaration(Set done)

Make the declarations, i.e. initialize the declare variable to correct values. This will declare every variable that is marked as used, but not done.

Overrides:

makeDeclaration in class InstructionContainer

Parameters:

done - The set of the already declare variables.

dumpInstruction

public void dumpInstruction(TabbedPrintWriter writer)
                     throws 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:

IOException