Package com.ibm.wala.ssa

Class SSAUnaryOpInstruction

java.lang.Object

com.ibm.wala.ssa.SSAInstruction

com.ibm.wala.ssa.SSAAbstractUnaryInstruction

com.ibm.wala.ssa.SSAUnaryOpInstruction

Direct Known Subclasses:

AssignInstruction, SSAPiInstruction

public class SSAUnaryOpInstruction
extends SSAAbstractUnaryInstruction

An SSA instruction for some unary operator.

See Also:

• for a list of operators

Nested Class Summary

Nested classes/interfaces inherited from class com.ibm.wala.ssa.SSAInstruction

SSAInstruction.IVisitor, SSAInstruction.Visitor

Field Summary

Fields inherited from class com.ibm.wala.ssa.SSAAbstractUnaryInstruction

result, val

Fields inherited from class com.ibm.wala.ssa.SSAInstruction

NO_INDEX

Constructor Summary

Constructors

Constructor	Description
SSAUnaryOpInstruction(int iindex, IUnaryOpInstruction.IOperator operator, int result, int val)

Method Summary

Modifier and Type	Method	Description
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.
IUnaryOpInstruction.IOperator	getOpcode()
String	toString(SymbolTable symbolTable)
void	visit(SSAInstruction.IVisitor v)	Apply an IVisitor to this instruction.

Methods inherited from class com.ibm.wala.ssa.SSAAbstractUnaryInstruction

getDef, getDef, getNumberOfDefs, getNumberOfUses, getUse, hasDef, hashCode, isFallThrough

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

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

Methods inherited from class java.lang.Object

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

Constructor Details

SSAUnaryOpInstruction

public SSAUnaryOpInstruction(int iindex,
 IUnaryOpInstruction.IOperator operator,
 int result,
 int val)

Method Details

copyForSSA

public SSAInstruction copyForSSA(SSAInstructionFactory insts,
 int[] defs,
 int[] uses)
                          throws IllegalArgumentException

Description copied from class: SSAInstruction

This method is meant to be used during SSA conversion for an IR that is not in SSA form. It creates a new SSAInstruction of the same type as the receiver, with a combination of the receiver's uses and defs and those from the method parameters.

In particular, if the 'defs' parameter is null, then the new instruction has the same defs as the receiver. If 'defs' is not null, it must be an array with a size equal to the number of defs that the receiver instruction has. In this case, the new instruction has defs taken from the array. The uses of the new instruction work in the same way with the 'uses' parameter.

Note that this only applies to CAst-based IR translation, since Java bytecode-based IR generation uses a different SSA construction mechanism.

TODO: move this into the SSAInstructionFactory

Specified by:

copyForSSA in class SSAInstruction

Throws:

IllegalArgumentException

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

See Also:

• SSAInstruction.visit(IVisitor)

getOpcode

public IUnaryOpInstruction.IOperator getOpcode()