Package edu.umd.cs.findbugs.ba

Class BackwardDataflowAnalysis<Fact>

java.lang.Object

edu.umd.cs.findbugs.ba.BasicAbstractDataflowAnalysis<Fact>

edu.umd.cs.findbugs.ba.AbstractDataflowAnalysis<Fact>

edu.umd.cs.findbugs.ba.BackwardDataflowAnalysis<Fact>

All Implemented Interfaces:

DataflowAnalysis<Fact>

Direct Known Subclasses:

LiveLocalStoreAnalysis, UnconditionalValueDerefAnalysis

public abstract class BackwardDataflowAnalysis<Fact>
extends AbstractDataflowAnalysis<Fact>

Abstract base class for backward dataflow analyses. Provides convenient implementations for isForwards() and getBlockOrder() methods.

Author:

David Hovemeyer

See Also:

• Dataflow
• DataflowAnalysis

Constructor Summary

Constructors

Constructor	Description
BackwardDataflowAnalysis(ReverseDepthFirstSearch rdfs, DepthFirstSearch dfs)

Method Summary

Modifier and Type	Method	Description
BlockOrder	getBlockOrder(CFG cfg)	Return the BlockOrder specifying the order in which BasicBlocks should be visited in the main dataflow loop.
protected ReverseDepthFirstSearch	getReverseDepthFirstSearch()
boolean	isForwards()	Returns true if the analysis is forwards, false if backwards.

Methods inherited from class edu.umd.cs.findbugs.ba.AbstractDataflowAnalysis

getFactAfterLocation, getFactAtLocation, isFactValid, transfer, transferInstruction

Methods inherited from class edu.umd.cs.findbugs.ba.BasicAbstractDataflowAnalysis

edgeTransfer, factToString, finishIteration, getFactOnEdge, getLastUpdateTimestamp, getResultFact, getStartFact, resultFactIterator, setLastUpdateTimestamp, startIteration

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.umd.cs.findbugs.ba.DataflowAnalysis

copy, createFact, initEntryFact, isTop, makeFactTop, meetInto, same

Constructor Details

BackwardDataflowAnalysis

public BackwardDataflowAnalysis(ReverseDepthFirstSearch rdfs,
 DepthFirstSearch dfs)

Method Details

getReverseDepthFirstSearch

protected ReverseDepthFirstSearch getReverseDepthFirstSearch()

isForwards

public boolean isForwards()

Description copied from interface: DataflowAnalysis

Returns true if the analysis is forwards, false if backwards.

getBlockOrder

public BlockOrder getBlockOrder(CFG cfg)

Description copied from interface: DataflowAnalysis

Return the BlockOrder specifying the order in which BasicBlocks should be visited in the main dataflow loop.

Parameters:

cfg - the CFG upon which we're performing dataflow analysis