dk.brics.tajs.flowgraph.jsnodes

Class DeletePropertyNode

java.lang.Object

dk.brics.tajs.flowgraph.AbstractNode

dk.brics.tajs.flowgraph.jsnodes.Node

dk.brics.tajs.flowgraph.jsnodes.LoadNode

dk.brics.tajs.flowgraph.jsnodes.DeletePropertyNode

public class DeletePropertyNode
extends LoadNode

Delete property node.

v_result = delete v_base[v_property]
or
v_result = delete v_base.property
or
v_result = delete x (for variables)

Field Summary

Fields inherited from class dk.brics.tajs.flowgraph.AbstractNode

EXCEPTION_REG, FIRST_ORDINARY_REG, NO_VALUE, RETURN_REG

Constructor Summary

Constructors

Constructor and Description
DeletePropertyNode(int base_reg, int property_reg, int result_reg, SourceLocation location) Constructs a new delete property node for a reference with variable property name.
DeletePropertyNode(int base_reg, String property_str, int result_reg, SourceLocation location) Constructs a new delete property node for a reference with fixed property name.
DeletePropertyNode(String varname, int result_reg, SourceLocation location) Constructs a new delete property node for a variable.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canThrowExceptions() Returns true if this node may throw exceptions.
void	check(BasicBlock b) Perform a consistency check of this node.
int	getBaseRegister() Returns the base register, or AbstractNode.NO_VALUE if not applicable.
int	getPropertyRegister() Returns the property register, or AbstractNode.NO_VALUE if not applicable.
String	getPropertyString() Returns the property string, or null if not fixed or not a reference.
String	getVariableName() Returns the source variable name, or null if not a variable.
boolean	isPropertyFixed() Returns true if the property is a fixed string.
boolean	isVariable() Returns true if the argument is a variable, false if it is an ordinary reference.
void	setBaseRegister(int base_reg) Sets the base register
void	setPropertyRegister(int property_reg) Sets the property register.
String	toString() Returns a string description of this node.
<ArgType> void	visitBy(NodeVisitor<ArgType> v, ArgType a) Visits this node with the given visitor.

Methods inherited from class dk.brics.tajs.flowgraph.jsnodes.LoadNode

getResultRegister

Methods inherited from class dk.brics.tajs.flowgraph.jsnodes.Node

visitBy

Methods inherited from class dk.brics.tajs.flowgraph.AbstractNode

getBlock, getDuplicateOf, getIndex, getSourceLocation, isArtificial, isDead, isRegistersDone, setArtificial, setBlock, setDead, setDuplicateOf, setIndex, setRegistersDone

Methods inherited from class java.lang.Object

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

Constructor Detail

DeletePropertyNode

public DeletePropertyNode(int base_reg,
                  int property_reg,
                  int result_reg,
                  SourceLocation location)

Constructs a new delete property node for a reference with variable property name.

DeletePropertyNode

public DeletePropertyNode(int base_reg,
                  String property_str,
                  int result_reg,
                  SourceLocation location)

Constructs a new delete property node for a reference with fixed property name.

DeletePropertyNode

public DeletePropertyNode(String varname,
                  int result_reg,
                  SourceLocation location)

Constructs a new delete property node for a variable.

Method Detail

canThrowExceptions

public boolean canThrowExceptions()

Description copied from class: AbstractNode

Returns true if this node may throw exceptions.

Specified by:

canThrowExceptions in class AbstractNode

check

public void check(BasicBlock b)

Description copied from class: AbstractNode

Perform a consistency check of this node. Default implementation does nothing.

Overrides:

check in class AbstractNode

Parameters:

b - basic block containing this node

getBaseRegister

public int getBaseRegister()

Returns the base register, or AbstractNode.NO_VALUE if not applicable.

getPropertyRegister

public int getPropertyRegister()

Returns the property register, or AbstractNode.NO_VALUE if not applicable.

getPropertyString

public String getPropertyString()

Returns the property string, or null if not fixed or not a reference.

getVariableName

public String getVariableName()

Returns the source variable name, or null if not a variable.

isPropertyFixed

public boolean isPropertyFixed()

Returns true if the property is a fixed string.

isVariable

public boolean isVariable()

Returns true if the argument is a variable, false if it is an ordinary reference.

setBaseRegister

public void setBaseRegister(int base_reg)

Sets the base register

setPropertyRegister

public void setPropertyRegister(int property_reg)

Sets the property register.

toString

public String toString()

Description copied from class: AbstractNode

Returns a string description of this node.

Specified by:

toString in class AbstractNode

visitBy

public <ArgType> void visitBy(NodeVisitor<ArgType> v,
                     ArgType a)

Description copied from class: Node

Visits this node with the given visitor.

Specified by:

visitBy in class Node