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

Modifier and Type	Field and Description
static String	BLOCK
static String	CURRENT_MODULE
static String	CURRENT_SCOPE

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

EMPTY_ARRAY

Constructor Summary

Constructors

Constructor and Description
Variable()

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	cloneForCloningClosure(InlinerInfo ii)
Operand	cloneForInlining(InlinerInfo ii)
abstract String	getName()
Operand	getSimplifiedOperand(Map<Operand,Operand> valueMap, boolean force)
Operand	getValue(Map<Operand,Operand> valueMap)
boolean	isImplicitBlockArg()

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

fetchCompileTimeArrayElement, 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

Field Detail

BLOCK

public static final String BLOCK

See Also:

Constant Field Values

CURRENT_SCOPE

public static final String CURRENT_SCOPE

See Also:

Constant Field Values

CURRENT_MODULE

public static final String CURRENT_MODULE

See Also:

Constant Field Values

Constructor Detail

Variable

public Variable()

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

isImplicitBlockArg

public boolean isImplicitBlockArg()

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

cloneForCloningClosure

public abstract Variable cloneForCloningClosure(InlinerInfo ii)

cloneForInlining

public Operand cloneForInlining(InlinerInfo ii)

Specified by:

cloneForInlining in class Operand