harpoon.IR.LowQuad
Class PGET

java.lang.Object
  harpoon.IR.Quads.Quad
      harpoon.IR.LowQuad.LowQuad
          harpoon.IR.LowQuad.PGET

All Implemented Interfaces:

HCodeElement, CFGraphable<Quad,Edge>, UseDefable, Graph.Node<Quad,Edge>, Serializable, Cloneable, Comparable<Quad>

public class PGET
extends LowQuad

PGET represents a POINTER dereference to get a field or array element. The ptr Temp ought to contain a POINTER value.

Version:

$Id: PGET.java,v 1.5 2002/04/11 04:00:21 cananian Exp $

Author:

C. Scott Ananian <cananian@alumni.princeton.edu>

See Also:

Serialized Form

Field Summary

protected Temp	dst Temp in which to store the fetched field or array element.
protected Temp	ptr Temp holding the POINTER value to dereference and fetch.
protected HClass	type The type of the object we are fetching.

Fields inherited from class harpoon.IR.Quads.Quad

arrayFactory

Constructor Summary

PGET(LowQuadFactory qf, HCodeElement source, Temp dst, Temp ptr, HClass type)
Creates a PGET representing a pointer dereference and fetch.

Method Summary

Temp[]	def() Return all the Temps defined by this Quad.
Temp	dst() Returns the Temp in which to store the fetched field or array element.
int	kind() Return an integer enumeration of the kind of this Quad.
Temp	ptr() Returns the Temp holding the POINTER value to dereference and fetch.
Quad	rename(QuadFactory qf, TempMap defMap, TempMap useMap) Create a new Quad identical to the receiver, but with all Temps renamed according to a mapping.
String	toString() Force everyone to reimplement toString()
HClass	type() Returns the type of the field or array element we are fetching.
Temp[]	use() Return all the Temps used by this Quad.

Methods inherited from class harpoon.IR.LowQuad.LowQuad

accept, accept

Methods inherited from class harpoon.IR.Quads.Quad

addEdge, addEdges, addHandlers, clone, clone, clone, compareTo, defC, edgeC, edges, getFactory, getID, getLineNumber, getSourceFile, handlers, hashCode, isPred, isSucc, map, map, map, next, next, nextEdge, nextEdge, nextLength, pred, predC, prev, prev, prevEdge, prevEdge, prevLength, remove, removeHandlers, rename, replace, succ, succC, toLongString, transferHandlers, useC

Methods inherited from class java.lang.Object

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

Field Detail

dst

protected final Temp dst

Temp in which to store the fetched field or array element.

ptr

protected final Temp ptr

Temp holding the POINTER value to dereference and fetch.

type

protected final HClass type

The type of the object we are fetching. This may be a sub-integer type, and thus disagree with the type of dst. For non-primitive types, this may be simply Object; use a typemap and the dst field if you need accurate non-primitive types.

Constructor Detail

PGET

public PGET(LowQuadFactory qf,
            HCodeElement source,
            Temp dst,
            Temp ptr,
            HClass type)

Creates a PGET representing a pointer dereference and fetch.

Parameters:

dst - the Temp in which to store the fetched field or element.

ptr - the Temp holding the POINTER value to dereference.

type - the type of the object we are fetching; possibly a sub-integer type. Not necessarily precise if non-primitive.

Method Detail

dst

public Temp dst()

Returns the Temp in which to store the fetched field or array element.

ptr

public Temp ptr()

Returns the Temp holding the POINTER value to dereference and fetch.

type

public HClass type()

Returns the type of the field or array element we are fetching. Not necessarily precise if non-primitive. May be a sub-integer type.

kind

public int kind()

Description copied from class: Quad

Return an integer enumeration of the kind of this Quad. The enumerated values are defined in QuadKind.

Specified by:

kind in class Quad

use

public Temp[] use()

Description copied from class: Quad

Return all the Temps used by this Quad.

Specified by:

use in interface UseDefable

Overrides:

use in class Quad

def

public Temp[] def()

Description copied from class: Quad

Return all the Temps defined by this Quad.

Specified by:

def in interface UseDefable

Overrides:

def in class Quad

rename

public Quad rename(QuadFactory qf,
                   TempMap defMap,
                   TempMap useMap)

Description copied from class: Quad

Create a new Quad identical to the receiver, but with all Temps renamed according to a mapping. The new Quad will have no edges.

The new Quad will come from the specified QuadFactory.

Specified by:

rename in class Quad

toString

public String toString()

Description copied from class: Quad

Force everyone to reimplement toString()

Specified by:

toString in class Quad