dk.brics.tajs.flowgraph.jsnodes

Class ReadVariableNode

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.ReadVariableNode

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class ReadVariableNode
extends LoadNode

Read variable node.

v_result = x

See Also:

Serialized Form

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
ReadVariableNode(java.lang.String varname, int result_reg, int result_base_reg, SourceLocation location) Constructs a new read variable node.

Method Summary

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	getResultBaseRegister() Returns the result base register.
java.lang.String	getVariableName() Returns the source variable name.
java.lang.String	toString() Returns a string description of this node.
void	visitBy(NodeVisitor v) 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

clone, getBlock, getDuplicateOf, getImplicitAfterCall, getIndex, getSourceLocation, getThisOrDuplicateOf, isArtificial, isRegistersDone, setArtificial, setBlock, setDuplicateOf, setImplicitAfterCall, setIndex, setRegistersDone, setSourceLocation

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadVariableNode

public ReadVariableNode(java.lang.String varname,
                        int result_reg,
                        int result_base_reg,
                        SourceLocation location)

Constructs a new read variable node.

Parameters:

varname - The name of the variable.

result_reg - The register for the result.

result_base_reg - The register for the base variable.

location - The source location.

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

getResultBaseRegister

public int getResultBaseRegister()

Returns the result base register. AbstractNode.NO_VALUE means 'absent', which is used for "this".

getVariableName

public java.lang.String getVariableName()

Returns the source variable name.

toString

public java.lang.String toString()

Description copied from class: AbstractNode

Returns a string description of this node.

Specified by:

toString in class AbstractNode

visitBy

public void visitBy(NodeVisitor v)

Description copied from class: Node

Visits this node with the given visitor.

Specified by:

visitBy in class Node