dk.brics.tajs.flowgraph.jsnodes

Class ConstantNode

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.ConstantNode

public class ConstantNode
extends LoadNode

Constant node.

v = constant

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ConstantNode.Type The different kinds of constant values.

Field Summary

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

EXCEPTION_REG, FIRST_ORDINARY_REG, NO_VALUE, RETURN_REG

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canThrowExceptions() Returns true if this node may throw exceptions.
boolean	getBoolean() Returns the boolean (for Type.BOOLEAN only).
double	getNumber() Returns the number (for Type.NUMBER only).
String	getString() Returns the string (for Type.STRING only).
ConstantNode.Type	getType() Returns the type.
boolean	isSSA() Returns true if result_reg is only assigned by this node.
static ConstantNode	makeBoolean(boolean bool, int result_reg, boolean ssa, SourceLocation location) Constructs a new constant boolean node.
static ConstantNode	makeBoolean(boolean bool, int result_reg, SourceLocation location) Constructs a new constant boolean node.
static ConstantNode	makeNull(int result_reg, boolean ssa, SourceLocation location) Constructs a new constant 'null' node.
static ConstantNode	makeNull(int result_reg, SourceLocation location) Constructs a new constant 'null' node.
static ConstantNode	makeNumber(double number, int result_reg, boolean ssa, SourceLocation location) Constructs a new constant number node.
static ConstantNode	makeNumber(double number, int result_reg, SourceLocation location) Constructs a new constant number node.
static ConstantNode	makeString(String string, int result_reg, boolean ssa, SourceLocation location) Constructs a new constant string node.
static ConstantNode	makeString(String string, int result_reg, SourceLocation location) Constructs a new constant string node.
static ConstantNode	makeUndefined(int result_reg, boolean ssa, SourceLocation location) Constructs a new constant 'undefined' node.
static ConstantNode	makeUndefined(int result_reg, SourceLocation location) Constructs a new constant 'undefined' node.
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

check, 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

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

getBoolean

public boolean getBoolean()

Returns the boolean (for Type.BOOLEAN only).

getNumber

public double getNumber()

Returns the number (for Type.NUMBER only).

getString

public String getString()

Returns the string (for Type.STRING only).

getType

public ConstantNode.Type getType()

Returns the type.

isSSA

public boolean isSSA()

Returns true if result_reg is only assigned by this node.

makeBoolean

public static ConstantNode makeBoolean(boolean bool,
                       int result_reg,
                       boolean ssa,
                       SourceLocation location)

Constructs a new constant boolean node.

Parameters:

bool - The boolean.

result_reg - The register to store the boolean in.

ssa - Is the boolean in SSA form.

location - The source location.

Returns:

Returns a new node representing the boolean.

makeBoolean

public static ConstantNode makeBoolean(boolean bool,
                       int result_reg,
                       SourceLocation location)

Constructs a new constant boolean node.

Parameters:

bool - The boolean.

result_reg - The register to store the boolean in.

location - The source location.

Returns:

Returns a new node representing the boolean.

makeNull

public static ConstantNode makeNull(int result_reg,
                    boolean ssa,
                    SourceLocation location)

Constructs a new constant 'null' node.

Parameters:

result_reg - The register to store the 'null' in.

ssa - Is the null in SSA form.

location - The source location.

Returns:

Returns a new node representing the null.

makeNull

public static ConstantNode makeNull(int result_reg,
                    SourceLocation location)

Constructs a new constant 'null' node.

Parameters:

result_reg - The register to store the 'null' in.

location - The source location.

Returns:

Returns a new node representing the null.

makeNumber

public static ConstantNode makeNumber(double number,
                      int result_reg,
                      boolean ssa,
                      SourceLocation location)

Constructs a new constant number node.

Parameters:

number - The number.

result_reg - The register to store the number in.

ssa - Is the number in SSA form.

location - The source location.

Returns:

Returns a new node representing the number.

makeNumber

public static ConstantNode makeNumber(double number,
                      int result_reg,
                      SourceLocation location)

Constructs a new constant number node.

Parameters:

number - The number.

result_reg - The register to store the number in.

location - The source location.

Returns:

Returns a new node representing the number.

makeString

public static ConstantNode makeString(String string,
                      int result_reg,
                      boolean ssa,
                      SourceLocation location)

Constructs a new constant string node.

Parameters:

string - The string.

result_reg - The register to store the string in.

ssa - Is the string in SSA form.

location - The source location.

Returns:

Returns a new node representing the string.

makeString

public static ConstantNode makeString(String string,
                      int result_reg,
                      SourceLocation location)

Constructs a new constant string node.

Parameters:

string - The string.

result_reg - The register to store the string in.

location - The source location.

Returns:

Returns a new node representing the string.

makeUndefined

public static ConstantNode makeUndefined(int result_reg,
                         boolean ssa,
                         SourceLocation location)

Constructs a new constant 'undefined' node.

Parameters:

result_reg - The register to store the undefined in.

ssa - Is the undefined in SSA form.

location - The source location.

Returns:

Returns a new node representing the undefined.

makeUndefined

public static ConstantNode makeUndefined(int result_reg,
                         SourceLocation location)

Constructs a new constant 'undefined' node.

Parameters:

result_reg - The register to store the undefined in.

location - The source location.

Returns:

Returns a new node representing the undefined.

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