com.ibm.wala.ipa.callgraph.propagation
Class SSAPropagationCallGraphBuilder.ConstraintVisitor

java.lang.Object
  com.ibm.wala.ssa.SSAInstruction.Visitor
      com.ibm.wala.ipa.callgraph.propagation.SSAPropagationCallGraphBuilder.ConstraintVisitor

All Implemented Interfaces:

SSAInstruction.IVisitor

Direct Known Subclasses:

AstSSAPropagationCallGraphBuilder.AstConstraintVisitor

Enclosing class:

SSAPropagationCallGraphBuilder

protected static class SSAPropagationCallGraphBuilder.ConstraintVisitor
extends SSAInstruction.Visitor

A visitor that generates constraints based on statements in SSA form.

Field Summary

protected SSAPropagationCallGraphBuilder	builder The governing call graph builder.
protected DefUse	du Def-use information
protected IR	ir The governing IR
protected ExplicitCallGraph.ExplicitNode	node The node whose statements we are currently traversing
protected SymbolTable	symbolTable Governing symbol table
protected PropagationSystem	system The governing propagation system, into which constraints are added

Constructor Summary

SSAPropagationCallGraphBuilder.ConstraintVisitor(SSAPropagationCallGraphBuilder builder, ExplicitCallGraph.ExplicitNode node)

Method Summary

protected InstanceKey[][]	computeInvariantParameters(SSAAbstractInvokeInstruction call) Side effect: records invariant parameters as implicit points-to-sets.
protected boolean	contentsAreInvariant(SymbolTable symbolTable, DefUse du, int valueNumber)
IBasicBlock	getBasicBlock()
protected SSAPropagationCallGraphBuilder	getBuilder()
protected IClassHierarchy	getClassHierarchy()
FilteredPointerKey	getFilteredPointerKeyForLocal(int valueNumber, FilteredPointerKey.TypeFilter filter)
InstanceKey	getInstanceKeyForAllocation(NewSiteReference allocation)
InstanceKey	getInstanceKeyForClassObject(TypeReference type)
InstanceKey	getInstanceKeyForConstant(java.lang.Object S)
InstanceKey	getInstanceKeyForMultiNewArray(NewSiteReference allocation, int dim)
InstanceKey	getInstanceKeyForPEI(ProgramCounter instr, TypeReference type)
protected InstanceKey[]	getInvariantContents(int valueNumber)
protected InstanceKey[]	getInvariantContents(SymbolTable symbolTable, DefUse du, CGNode node, int valueNumber)
protected AnalysisOptions	getOptions()
PointerKey	getPointerKeyForArrayContents(InstanceKey I)
PointerKey	getPointerKeyForExceptionalReturnValue()
PointerKey	getPointerKeyForInstanceField(InstanceKey I, IField f)
PointerKey	getPointerKeyForLocal(int valueNumber)
PointerKey	getPointerKeyForReturnValue()
PointerKey	getPointerKeyForStaticField(IField f)
java.lang.String	getStringConstantForInstanceKey(InstanceKey I)
CGNode	getTargetForCall(CGNode caller, CallSiteReference site, InstanceKey iKey)
protected WarningSet	getWarnings()
protected boolean	hasNoInterestingUses(int vn)
protected boolean	isRootType(IClass klass)
void	setBasicBlock(IBasicBlock block) The calling loop must call this in each iteration!
void	visitArrayLoad(SSAArrayLoadInstruction instruction)
void	visitArrayStore(SSAArrayStoreInstruction instruction)
void	visitCheckCast(SSACheckCastInstruction instruction)
void	visitGet(SSAGetInstruction instruction)
void	visitGetCaughtException(SSAGetCaughtExceptionInstruction instruction)
protected void	visitGetInternal(int lval, int ref, boolean isStatic, FieldReference field)
void	visitInvoke(SSAInvokeInstruction instruction)
protected void	visitInvokeInternal(SSAAbstractInvokeInstruction instruction)
void	visitLoadClass(SSALoadClassInstruction instruction)
void	visitNew(SSANewInstruction instruction)
void	visitPi(SSAPiInstruction instruction)
void	visitPut(SSAPutInstruction instruction)
void	visitPutInternal(int rval, int ref, boolean isStatic, FieldReference field)
void	visitReturn(SSAReturnInstruction instruction)
void	visitThrow(SSAThrowInstruction instruction)

Methods inherited from class com.ibm.wala.ssa.SSAInstruction.Visitor

visitArrayLength, visitBinaryOp, visitComparison, visitConditionalBranch, visitConversion, visitGoto, visitInstanceof, visitMonitor, visitPhi, visitSwitch, visitUnaryOp

Methods inherited from class java.lang.Object

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

Field Detail

builder

protected final SSAPropagationCallGraphBuilder builder

The governing call graph builder. This field is used instead of an inner class in order to allow more flexible reuse of this visitor in subclasses

node

protected final ExplicitCallGraph.ExplicitNode node

The node whose statements we are currently traversing

ir

protected final IR ir

The governing IR

system

protected final PropagationSystem system

The governing propagation system, into which constraints are added

symbolTable

protected final SymbolTable symbolTable

Governing symbol table

du

protected final DefUse du

Def-use information

Constructor Detail

SSAPropagationCallGraphBuilder.ConstraintVisitor

public SSAPropagationCallGraphBuilder.ConstraintVisitor(SSAPropagationCallGraphBuilder builder,
                                                        ExplicitCallGraph.ExplicitNode node)

Method Detail

getBuilder

protected SSAPropagationCallGraphBuilder getBuilder()

getWarnings

protected WarningSet getWarnings()

getOptions

protected AnalysisOptions getOptions()

getPointerKeyForLocal

public PointerKey getPointerKeyForLocal(int valueNumber)

getFilteredPointerKeyForLocal

public FilteredPointerKey getFilteredPointerKeyForLocal(int valueNumber,
                                                        FilteredPointerKey.TypeFilter filter)

getPointerKeyForReturnValue

public PointerKey getPointerKeyForReturnValue()

getPointerKeyForExceptionalReturnValue

public PointerKey getPointerKeyForExceptionalReturnValue()

getPointerKeyForStaticField

public PointerKey getPointerKeyForStaticField(IField f)

getPointerKeyForInstanceField

public PointerKey getPointerKeyForInstanceField(InstanceKey I,
                                                IField f)

getPointerKeyForArrayContents

public PointerKey getPointerKeyForArrayContents(InstanceKey I)

getInstanceKeyForAllocation

public InstanceKey getInstanceKeyForAllocation(NewSiteReference allocation)

getInstanceKeyForMultiNewArray

public InstanceKey getInstanceKeyForMultiNewArray(NewSiteReference allocation,
                                                  int dim)

getInstanceKeyForConstant

public InstanceKey getInstanceKeyForConstant(java.lang.Object S)

getStringConstantForInstanceKey

public java.lang.String getStringConstantForInstanceKey(InstanceKey I)

getInstanceKeyForPEI

public InstanceKey getInstanceKeyForPEI(ProgramCounter instr,
                                        TypeReference type)

getInstanceKeyForClassObject

public InstanceKey getInstanceKeyForClassObject(TypeReference type)

getTargetForCall

public CGNode getTargetForCall(CGNode caller,
                               CallSiteReference site,
                               InstanceKey iKey)

contentsAreInvariant

protected boolean contentsAreInvariant(SymbolTable symbolTable,
                                       DefUse du,
                                       int valueNumber)

getInvariantContents

protected InstanceKey[] getInvariantContents(int valueNumber)

getInvariantContents

protected InstanceKey[] getInvariantContents(SymbolTable symbolTable,
                                             DefUse du,
                                             CGNode node,
                                             int valueNumber)

getClassHierarchy

protected IClassHierarchy getClassHierarchy()

hasNoInterestingUses

protected boolean hasNoInterestingUses(int vn)

isRootType

protected boolean isRootType(IClass klass)

visitArrayLoad

public void visitArrayLoad(SSAArrayLoadInstruction instruction)

Specified by:

visitArrayLoad in interface SSAInstruction.IVisitor

Overrides:

visitArrayLoad in class SSAInstruction.Visitor

visitArrayStore

public void visitArrayStore(SSAArrayStoreInstruction instruction)

Specified by:

visitArrayStore in interface SSAInstruction.IVisitor

Overrides:

visitArrayStore in class SSAInstruction.Visitor

visitCheckCast

public void visitCheckCast(SSACheckCastInstruction instruction)

Specified by:

visitCheckCast in interface SSAInstruction.IVisitor

Overrides:

visitCheckCast in class SSAInstruction.Visitor

visitReturn

public void visitReturn(SSAReturnInstruction instruction)

Specified by:

visitReturn in interface SSAInstruction.IVisitor

Overrides:

visitReturn in class SSAInstruction.Visitor

visitGet

public void visitGet(SSAGetInstruction instruction)

Specified by:

visitGet in interface SSAInstruction.IVisitor

Overrides:

visitGet in class SSAInstruction.Visitor

visitGetInternal

protected void visitGetInternal(int lval,
                                int ref,
                                boolean isStatic,
                                FieldReference field)

visitPut

public void visitPut(SSAPutInstruction instruction)

Specified by:

visitPut in interface SSAInstruction.IVisitor

Overrides:

visitPut in class SSAInstruction.Visitor

visitPutInternal

public void visitPutInternal(int rval,
                             int ref,
                             boolean isStatic,
                             FieldReference field)

visitInvoke

public void visitInvoke(SSAInvokeInstruction instruction)

Specified by:

visitInvoke in interface SSAInstruction.IVisitor

Overrides:

visitInvoke in class SSAInstruction.Visitor

visitInvokeInternal

protected void visitInvokeInternal(SSAAbstractInvokeInstruction instruction)

visitNew

public void visitNew(SSANewInstruction instruction)

Specified by:

visitNew in interface SSAInstruction.IVisitor

Overrides:

visitNew in class SSAInstruction.Visitor

visitThrow

public void visitThrow(SSAThrowInstruction instruction)

Specified by:

visitThrow in interface SSAInstruction.IVisitor

Overrides:

visitThrow in class SSAInstruction.Visitor

visitGetCaughtException

public void visitGetCaughtException(SSAGetCaughtExceptionInstruction instruction)

Specified by:

visitGetCaughtException in interface SSAInstruction.IVisitor

Overrides:

visitGetCaughtException in class SSAInstruction.Visitor

visitPi

public void visitPi(SSAPiInstruction instruction)

Specified by:

visitPi in interface SSAInstruction.IVisitor

Overrides:

visitPi in class SSAInstruction.Visitor

getBasicBlock

public IBasicBlock getBasicBlock()

setBasicBlock

public void setBasicBlock(IBasicBlock block)

The calling loop must call this in each iteration!

computeInvariantParameters

protected InstanceKey[][] computeInvariantParameters(SSAAbstractInvokeInstruction call)

Side effect: records invariant parameters as implicit points-to-sets.

Returns:

if non-null, then result[i] holds the set of instance keys which may be passed as the ith parameter. (which must be invariant)

visitLoadClass

public void visitLoadClass(SSALoadClassInstruction instruction)

Specified by:

visitLoadClass in interface SSAInstruction.IVisitor

Overrides:

visitLoadClass in class SSAInstruction.Visitor