soot.jimple.toolkits.pointer
Class CastCheckEliminator
java.lang.Object
|
+--soot.toolkits.scalar.AbstractFlowAnalysis
|
+--soot.toolkits.scalar.BranchedFlowAnalysis
|
+--soot.toolkits.scalar.ForwardBranchedFlowAnalysis
|
+--soot.jimple.toolkits.pointer.CastCheckEliminator
- public class CastCheckEliminator
- extends ForwardBranchedFlowAnalysis
A flow analysis that detects redundant cast checks.
Method Summary |
protected void |
copy(java.lang.Object source,
java.lang.Object dest)
Creates a copy of the source flow object in dest . |
protected java.lang.Object |
entryInitialFlow()
Returns a new, aggressive (local,type) set. |
protected void |
flowThrough(java.lang.Object inValue,
Unit unit,
java.util.List outFallValues,
java.util.List outBranchValues)
This is the flow function as described in the assignment write-up. |
protected void |
makeInitialSet()
Find all the locals of reference type and all the types used in casts
to initialize the mapping from locals and types to bits in the bit vector
in LocalTypeSet. |
protected void |
merge(java.lang.Object in1,
java.lang.Object in2,
java.lang.Object out)
Compute the merge of the in1 and in2 sets, putting the result into out . |
protected java.lang.Object |
newInitialFlow()
Returns a new, aggressive (local,type) set. |
protected void |
tagCasts()
Put the results of the analysis into tags in cast statements. |
Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
CastCheckEliminator
public CastCheckEliminator(BriefUnitGraph cfg)
tagCasts
protected void tagCasts()
- Put the results of the analysis into tags in cast statements.
makeInitialSet
protected void makeInitialSet()
- Find all the locals of reference type and all the types used in casts
to initialize the mapping from locals and types to bits in the bit vector
in LocalTypeSet.
newInitialFlow
protected java.lang.Object newInitialFlow()
- Returns a new, aggressive (local,type) set.
- Overrides:
- newInitialFlow in class AbstractFlowAnalysis
flowThrough
protected void flowThrough(java.lang.Object inValue,
Unit unit,
java.util.List outFallValues,
java.util.List outBranchValues)
- This is the flow function as described in the assignment write-up.
- Overrides:
- flowThrough in class BranchedFlowAnalysis
copy
protected void copy(java.lang.Object source,
java.lang.Object dest)
- Description copied from class: AbstractFlowAnalysis
- Creates a copy of the
source
flow object in dest
.
- Overrides:
- copy in class AbstractFlowAnalysis
merge
protected void merge(java.lang.Object in1,
java.lang.Object in2,
java.lang.Object out)
- Description copied from class: AbstractFlowAnalysis
- Compute the merge of the
in1
and in2
sets, putting the result into out
.
The behavior of this function depends on the implementation ( it may be necessary to check whether
in1
and in2
are equal or aliased ).
Used by the doAnalysis method.
- Overrides:
- merge in class AbstractFlowAnalysis
entryInitialFlow
protected java.lang.Object entryInitialFlow()
- Returns a new, aggressive (local,type) set.
- Overrides:
- entryInitialFlow in class AbstractFlowAnalysis