org.jikesrvm.compilers.opt.ir

Class RegSpillListElement

java.lang.Object

org.jikesrvm.compilers.opt.ir.RegSpillListElement

public class RegSpillListElement
extends Object

A class to hold each element in the GCIRMap

Field Summary

Fields

Modifier and Type	Field and Description
private Register	symbolicReg this should be a symbolic register
private int	value This could be either a spill or a real reg number.

Constructor Summary

Constructors

Constructor and Description
RegSpillListElement(Register symbolicReg) Constructor

Method Summary

Modifier and Type	Method and Description
int	getRealRegNumber() returns the real (physical) register associated with this object
int	getSpill() returns the spill value associated with this object
Register	getSymbolicReg() returns the symbolic register associated with this object
boolean	isSpill() Is this a spill?
void	setRealReg(Register reg) Sets the real (i.e., physical) register component associated with this object
void	setSpill(int value) Sets the spill component associated with this object
String	toString() return a string version of this object

Methods inherited from class java.lang.Object

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

Field Detail

symbolicReg

private final Register symbolicReg

this should be a symbolic register

value

private int value

This could be either a spill or a real reg number. Spills are stored as they are. For register numbers, we store the negative value.

Constructor Detail

RegSpillListElement

public RegSpillListElement(Register symbolicReg)

Constructor

Parameters:

symbolicReg - the symbolic register holding the reference

Method Detail

setSpill

public final void setSpill(int value)

Sets the spill component associated with this object

Parameters:

value - the spill value

setRealReg

public final void setRealReg(Register reg)

Sets the real (i.e., physical) register component associated with this object

Parameters:

reg - the real (physical) register

isSpill

public final boolean isSpill()

Is this a spill?

Returns:

whether this is a spill

getSymbolicReg

public final Register getSymbolicReg()

returns the symbolic register associated with this object

Returns:

the symbolic register associated with this object

getRealRegNumber

public final int getRealRegNumber()

returns the real (physical) register associated with this object

Returns:

the real (physical) register associated with this object

getSpill

public final int getSpill()

returns the spill value associated with this object

Returns:

the spill value associated with this object

toString

public String toString()

return a string version of this object

Overrides:

toString in class Object

Returns:

string version of this object