scale.clef2scribble
Class ExprTuple

java.lang.Object
  scale.clef2scribble.ExprTuple

public final class ExprTuple
extends java.lang.Object

This class holds a SESE region of basic blocks.

$Id: ExprTuple.java,v 1.15 2007-10-04 19:58:10 burrill Exp $

Copyright 2007 by the Scale Compiler Group,
Department of Computer Science
University of Massachusetts,
Amherst MA. 01003, USA
All Rights Reserved.

Because the region is SESE, we can represent the basic blocks with a single begin and end block. In scribble, statements serve as basic blocks. This class also holds a reference to the variable holding the result of the expression.

Constructor Summary

ExprTuple(Chord begin, Chord end)
Create a range of Chords.

ExprTuple(Expr exp, Chord begin, Chord end)
Record a range of Chords.

Method Summary

void	append(Chord s) Append the Chord to this range.
void	concat(ExprTuple sr) Append the range to this range.
Chord	getBegin() Return the first Chord in the range.
Chord	getEnd() Return the last Chord in the range.
Expr	getRef() Return a copy of the last expression in this range of CFG nodes.
void	setRef(Expr ref) Specify the last expression in this range of CFG nodes.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprTuple

public ExprTuple(Expr exp,
                 Chord begin,
                 Chord end)

Record a range of Chords. Begin and end may be null or neither arguments may be null.

Parameters:

exp - the result of the last expression or null

begin - first statement in the range

end - last statement in the range

ExprTuple

public ExprTuple(Chord begin,
                 Chord end)

Create a range of Chords. Both or neither arguments may be null.

Parameters:

begin - first statement in the range

end - last statement in the range

Method Detail

getBegin

public Chord getBegin()

Return the first Chord in the range.

getEnd

public Chord getEnd()

Return the last Chord in the range.

concat

public void concat(ExprTuple sr)

Append the range to this range.

Parameters:

sr - is the range to be appended

append

public void append(Chord s)

Append the Chord to this range.

Parameters:

s - is the Chord to be appended

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getRef

public Expr getRef()

Return a copy of the last expression in this range of CFG nodes.

setRef

public void setRef(Expr ref)

Specify the last expression in this range of CFG nodes.