org.jruby.ir.operands

Class Variable

java.lang.Object

org.jruby.ir.operands.Operand

org.jruby.ir.operands.Variable

All Implemented Interfaces:

Comparable

Direct Known Subclasses:

LocalVariable, TemporaryVariable

public abstract class Variable
extends Operand
implements Comparable

Field Summary

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

EMPTY_ARRAY

Constructor Summary

Constructors

Constructor and Description
Variable(OperandType type)

Method Summary

Methods

Modifier and Type	Method and Description
void	addUsedVariables(List<Variable> l) Append the list of variables used in this operand to the input list
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.
abstract Variable	clone(SimpleCloneInfo ii)
Operand	cloneForInlining(CloneInfo ii)
abstract String	getName()
Operand	getSimplifiedOperand(Map<Operand,Operand> valueMap, boolean force)
Operand	getValue(Map<Operand,Operand> valueMap)
boolean	isSelf()

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

encode, getOperandType, hasKnownValue, retrieve, visit

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Comparable

compareTo

Constructor Detail

Variable

public Variable(OperandType type)

Method Detail

getName

public abstract String getName()

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.

getSimplifiedOperand

public Operand getSimplifiedOperand(Map<Operand,Operand> valueMap,
                           boolean force)

Overrides:

getSimplifiedOperand in class Operand

isSelf

public boolean isSelf()

getValue

public Operand getValue(Map<Operand,Operand> valueMap)

Overrides:

getValue in class Operand

addUsedVariables

public void addUsedVariables(List<Variable> l)

Append the list of variables used in this operand to the input list

Specified by:

addUsedVariables in class Operand

clone

public abstract Variable clone(SimpleCloneInfo ii)

cloneForInlining

public Operand cloneForInlining(CloneInfo ii)

Specified by:

cloneForInlining in class Operand