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java.lang.Object soot.jimple.toolkits.scalar.pre.EarliestnessComputation
public class EarliestnessComputation
Computes the earliest points for the given expressions.
This basicly finds the highest point in the flow-graph where we can put each
computation, without introducing new computations on any path.
More technically: A computation is earliest, if at the current point the
computation is down-safe, and if either:
Note that this computation is linear in the number of units, as we don't need to find any fixed-point.
UpSafetyAnalysis
,
DownSafetyAnalysis
Constructor Summary | |
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EarliestnessComputation(UnitGraph unitGraph,
UpSafetyAnalysis upSafe,
DownSafetyAnalysis downSafe,
SideEffectTester sideEffect)
given an UpSafetyAnalysis and a DownSafetyAnalysis, performs the earliest-computation. |
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EarliestnessComputation(UnitGraph unitGraph,
UpSafetyAnalysis upSafe,
DownSafetyAnalysis downSafe,
SideEffectTester sideEffect,
FlowSet set)
given an UpSafetyAnalysis and a DownSafetyAnalysis, performs the earliest-computation. allows to share sets over multiple analyses (set-operations are usually more efficient, if the sets come from the same source). |
Method Summary | |
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Object |
getFlowBefore(Object node)
returns the FlowSet of expressions, that have their earliest computation just before node . |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public EarliestnessComputation(UnitGraph unitGraph, UpSafetyAnalysis upSafe, DownSafetyAnalysis downSafe, SideEffectTester sideEffect)
unitGraph
- the Unitgraph we'll work on.upSafe
- a UpSafetyAnalysis of unitGraph
downSafe
- a DownSafetyAnalysis of unitGraph
sideEffect
- the SideEffectTester that will tell if a node is
transparent or not.public EarliestnessComputation(UnitGraph unitGraph, UpSafetyAnalysis upSafe, DownSafetyAnalysis downSafe, SideEffectTester sideEffect, FlowSet set)
unitGraph
- the Unitgraph we'll work on.upSafe
- a UpSafetyAnalysis of unitGraph
downSafe
- a DownSafetyAnalysis of unitGraph
sideEffect
- the SideEffectTester that will tell if a node is
transparent or not.set
- the shared set.Method Detail |
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public Object getFlowBefore(Object node)
node
.
node
- a Object of the flow-graph (in our case always a unit).
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