Class SSAConversionInstruction

java.lang.Object

com.ibm.wala.ssa.SSAInstruction

com.ibm.wala.ssa.SSAConversionInstruction

public abstract class SSAConversionInstruction
extends SSAInstruction

An instruction which converts a value of one primitive type into another primitive type.

Nested Class Summary

Nested classes/interfaces inherited from class SSAInstruction

SSAInstruction.IVisitor, SSAInstruction.Visitor

Modifier and Type	Class	Description
static interface	SSAInstruction.IVisitor	This interface is used by Instruction.visit to dispatch based on the instruction type.
static class	SSAInstruction.Visitor	A base visitor implementation that does nothing.

Field Summary

Fields inherited from class SSAInstruction

NO_INDEX

Modifier and Type	Field	Description
static final int	NO_INDEX

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SSAConversionInstruction(int iindex, int result, int val, TypeReference fromType, TypeReference toType)

Method Summary

Modifier and Type	Method	Description
int	getDef()
int	getDef(int i)	Return the ith def
TypeReference	getFromType()
int	getNumberOfDefs()
int	getNumberOfUses()
TypeReference	getToType()
int	getUse(int j)
boolean	hasDef()	Does this instruction define a normal value, as distinct from a set of exceptions possibly thrown by it (e.g.
int	hashCode()
boolean	isFallThrough()
String	toString(SymbolTable symbolTable)
void	visit(SSAInstruction.IVisitor v)	Apply an IVisitor to this instruction.

Methods inherited from class SSAInstruction

copyForSSA, equals, getExceptionTypes, getValueString, iIndex, isPEI, setInstructionIndex, toString

Modifier and Type	Method	Description
abstract SSAInstruction	copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses)	This method is meant to be used during SSA conversion for an IR that is not in SSA form.
final boolean	equals(Object obj)	We assume these instructions are canonical and managed by a governing IR object.
Collection<TypeReference>	getExceptionTypes()	This method should never return null.
protected String	getValueString(SymbolTable symbolTable, int valueNumber)
int	iIndex()
boolean	isPEI()
void	setInstructionIndex(int instructionIndex)
String	toString()

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

SSAConversionInstruction

protected SSAConversionInstruction(int iindex,
 int result,
 int val,
 TypeReference fromType,
 TypeReference toType)

Method Details

toString

public String toString(SymbolTable symbolTable)

Specified by:

toString in class SSAInstruction

visit

public void visit(SSAInstruction.IVisitor v)
           throws NullPointerException

Description copied from class: SSAInstruction

Apply an IVisitor to this instruction. We invoke the appropriate IVisitor method according to the type of this instruction.

Specified by:

visit in class SSAInstruction

Throws:

NullPointerException

hasDef

public boolean hasDef()

Description copied from class: SSAInstruction

Does this instruction define a normal value, as distinct from a set of exceptions possibly thrown by it (e.g. for invoke instructions).

Overrides:

hasDef in class SSAInstruction

Returns:

true if the instruction does define a proper value.

See Also:

• SSAInstruction.getDef()

getDef

public int getDef()

Overrides:

getDef in class SSAInstruction

getDef

public int getDef(int i)

Description copied from class: SSAInstruction

Return the ith def

Overrides:

getDef in class SSAInstruction

Parameters:

i - number of the def, starting at 0.

getNumberOfUses

public int getNumberOfUses()

Overrides:

getNumberOfUses in class SSAInstruction

getNumberOfDefs

public int getNumberOfDefs()

Overrides:

getNumberOfDefs in class SSAInstruction

getToType

public TypeReference getToType()

getFromType

public TypeReference getFromType()

getUse

public int getUse(int j)

Overrides:

getUse in class SSAInstruction

Returns:

value number representing the jth use in this instruction. -1 means TOP (i.e., the value doesn't matter)

hashCode

public int hashCode()

Specified by:

hashCode in class SSAInstruction

isFallThrough

public boolean isFallThrough()

Specified by:

isFallThrough in class SSAInstruction

Returns:

true iff this instruction may fall through to the next