edu.umd.cs.findbugs.ba.vna

Class MergeTree

public class MergeTree extends Object

Data structure to keep track of which input ValueNumbers were combined to produce which other output ValueNumbers.

Author: David Hovemeyer

Field Summary
static boolean	DEBUG

Constructor Summary
	MergeTree(ValueNumberFactory factory) Constructor.

Method Summary
BitSet	getInputSet(ValueNumber output) Get the set of input ValueNumbers which directly contributed to the given output ValueNumber.
BitSet	getTransitiveInputSet(ValueNumber output) Get the transitive set of input ValueNumbers which contributed (directly or indirectly) to the given output ValueNumber.
void	mapInputToOutput(ValueNumber input, ValueNumber output) Map an input ValueNumber to an output ValueNumber.

Field Detail

DEBUG

public static final boolean DEBUG

Constructor Detail

MergeTree

public MergeTree(ValueNumberFactory factory)

Constructor.

Parameters: factory the ValueNumberFactory

Method Detail

getInputSet

public BitSet getInputSet(ValueNumber output)

Get the set of input ValueNumbers which directly contributed to the given output ValueNumber.

Parameters: output the output ValueNumber

Returns: the set of direct input ValueNumbers

getTransitiveInputSet

public BitSet getTransitiveInputSet(ValueNumber output)

Get the transitive set of input ValueNumbers which contributed (directly or indirectly) to the given output ValueNumber.

Parameters: output the output ValueNumber

Returns: the transitive set of input ValueNumbers

mapInputToOutput

public void mapInputToOutput(ValueNumber input, ValueNumber output)

Map an input ValueNumber to an output ValueNumber.

Parameters: input the input ValueNumber output the output ValueNumber

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