org.multijava.util.backend
Class QStack

java.lang.Object
  org.multijava.util.backend.QOperand
      org.multijava.util.backend.QTemporary
          org.multijava.util.backend.QStack

All Implemented Interfaces:

QDestination, QOrigin

class QStack

extends QTemporary

This class represents a stack placeholder

Field Summary
static QTemporary[]	EMPTY
static int	UNINITIALIZED
static int	UNUSED

 

Constructor Summary
(package private)	QStack(int type)

 

Method Summary
void	def(BasicBlock block, int pos)           Uses a temporary
QOrigin	duplicate()           Duplicate this node
void	enforceColor()           Enforces the precolor
void	generate(CodeSequence seq)           Generates instructions for this quadruple
QTemporary	getDef()           Returns the defined temporary.
InstructionHandle	getInstruction()           Returns the primitive instruction
QOrigin[]	getOrigins()           returns the parameters of this instruction
int	getPosition()           Gets position
int	getPrecolor()           Returns the register number of this temporary
int	getRegister()           Returns the register number of this temporary
int	getSize()           Returns the size (the number of slot) of this temporary
int	getType()           The size (in instruction) of the subtree
int	getUseCount()           Returns the number of uses
QTemporary[]	getUses()           Returns the used temporaries.
void	setOrigin(QOrigin origin, int i)           Sets the parameters of this instruction
void	setPosition(int pos)           Sets position
void	setRegister(int reg)
void	store(CodeSequence seq, boolean isLive)           Generates instructions for destination
String	toString()           Human readable form
void	use(BasicBlock block, int pos)           Uses a temporary

 

Methods inherited from class java.lang.Object

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

 

Field Detail

UNINITIALIZED

public static final int UNINITIALIZED

UNUSED

public static final int UNUSED

EMPTY

public static final QTemporary[] EMPTY

QStack

QStack(int type)

toString

public String toString()

Human readable form

Overrides:

toString in class QTemporary

getDef

public QTemporary getDef()

Returns the defined temporary.

Specified by:

getDef in interface QDestination

Overrides:

getDef in class QTemporary

getUses

public QTemporary[] getUses()

Returns the used temporaries.

Specified by:

getUses in interface QOrigin

Overrides:

getUses in class QTemporary

generate

public void generate(CodeSequence seq)

Generates instructions for this quadruple

Specified by:

generate in interface QOrigin

Overrides:

generate in class QTemporary

Parameters:

seq - The code sequence of instruction

store

public void store(CodeSequence seq,
                  boolean isLive)

Generates instructions for destination

Specified by:

store in interface QDestination

Overrides:

store in class QTemporary

Parameters:

seq - The code sequence of instruction

isLive - Is the destination live after this store ?

getSize

public int getSize()

Returns the size (the number of slot) of this temporary

getRegister

public int getRegister()

Returns the register number of this temporary

getPrecolor

public int getPrecolor()

Returns the register number of this temporary

enforceColor

public void enforceColor()

Enforces the precolor

getType

public int getType()

The size (in instruction) of the subtree

Specified by:

getType in interface QOrigin

duplicate

public QOrigin duplicate()

Duplicate this node

Specified by:

duplicate in interface QOrigin

use

public void use(BasicBlock block,
                int pos)

Uses a temporary

def

public void def(BasicBlock block,
                int pos)

Uses a temporary

getUseCount

public int getUseCount()

Returns the number of uses

setPosition

public void setPosition(int pos)

Sets position

getPosition

public int getPosition()

Gets position

setRegister

public void setRegister(int reg)

getInstruction

public InstructionHandle getInstruction()

Returns the primitive instruction

Specified by:

getInstruction in interface QOrigin

getOrigins

public QOrigin[] getOrigins()

returns the parameters of this instruction

Specified by:

getOrigins in interface QOrigin

setOrigin

public void setOrigin(QOrigin origin,
                      int i)

Sets the parameters of this instruction

Specified by:

setOrigin in interface QOrigin