org.jruby.ir.operands

Class Label

java.lang.Object

org.jruby.ir.operands.Operand

org.jruby.ir.operands.Label

public class Label
extends Operand

Field Summary

Fields

Modifier and Type	Field and Description
int	id
String	prefix
static Label	UNRESCUED_REGION_LABEL

Fields inherited from class org.jruby.ir.operands.Operand

EMPTY_ARRAY

Constructor Summary

Constructors

Constructor and Description
Label(String prefix, int id)

Method Summary

Modifier and Type	Method and Description
void	addUsedVariables(List<Variable> l) Append the list of variables used in this operand to the input list -- force every operand to implement this because a missing implementation can cause bad failures.
boolean	canCopyPropagate() Can we replace every use of a variable 'v' that contains the value of this operand with the operand itself? This takes importance when there are at least two uses of 'v' within this scope.
Label	clone()
Operand	cloneForInlining(CloneInfo ii)
static Label	decode(IRReaderDecoder d)
void	encode(IRWriterEncoder e)
boolean	equals(Object o)
static Label	getGlobalEnsureBlockLabel()
OperandType	getOperandType()
int	getTargetPC()
int	hashCode()
boolean	isGlobalEnsureBlockLabel()
void	setTargetPC(int i)
String	toString()
void	visit(IRVisitor visitor)

Methods inherited from class org.jruby.ir.operands.Operand

getSimplifiedOperand, getValue, hasKnownValue, retrieve

Methods inherited from class java.lang.Object

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

Field Detail

UNRESCUED_REGION_LABEL

public static final Label UNRESCUED_REGION_LABEL

prefix

public final String prefix

id

public final int id

Constructor Detail

Label

public Label(String prefix,
             int id)

Method Detail

getGlobalEnsureBlockLabel

public static Label getGlobalEnsureBlockLabel()

getOperandType

public OperandType getOperandType()

Specified by:

getOperandType in class Operand

toString

public String toString()

Overrides:

toString in class Object

addUsedVariables

public void addUsedVariables(List<Variable> l)

Description copied from class: Operand

Append the list of variables used in this operand to the input list -- force every operand to implement this because a missing implementation can cause bad failures.

Specified by:

addUsedVariables in class Operand

canCopyPropagate

public boolean canCopyPropagate()

Description copied from class: Operand

Can we replace every use of a variable 'v' that contains the value of this operand with the operand itself? This takes importance when there are at least two uses of 'v' within this scope. Ex: v = [1,2,3]; x = v; y = v In this case, we cannot replace the occurences of 'v' because we would then get x = [1,2,3]; y = [1,2,3] which would then result in two different array objects being constructed instead of a single one.

Overrides:

canCopyPropagate in class Operand

Returns:

true if it is safe to copy-propagate the operand.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

isGlobalEnsureBlockLabel

public boolean isGlobalEnsureBlockLabel()

clone

public Label clone()

Overrides:

clone in class Object

cloneForInlining

public Operand cloneForInlining(CloneInfo ii)

Specified by:

cloneForInlining in class Operand

setTargetPC

public void setTargetPC(int i)

getTargetPC

public int getTargetPC()

encode

public void encode(IRWriterEncoder e)

Overrides:

encode in class Operand

decode

public static Label decode(IRReaderDecoder d)

visit

public void visit(IRVisitor visitor)

Overrides:

visit in class Operand