harpoon.IR.Tree
Class MOVE

java.lang.Object
  harpoon.IR.Tree.Tree
      harpoon.IR.Tree.Stm
          harpoon.IR.Tree.MOVE

All Implemented Interfaces:

HCodeElement, Typed

public class MOVE
extends Stm
implements Typed

MOVE statements assign a value to a location. MOVE(TEMP t, e) evaluates expression e and assigns its value into temporary t. MOVE(MEM(e1, k), e2) evaluates expression e1 yielding address a, then evaluates e2 and assigns its value into memory starting at address a.

Version:

$Id: MOVE.java,v 1.4 2002/04/10 03:05:45 cananian Exp $

Author:

C. Scott Ananian <cananian@alumni.princeton.edu>, based on Modern Compiler Implementation in Java by Andrew Appel.

Nested Class Summary

Nested classes/interfaces inherited from class harpoon.IR.Tree.Tree

Tree.CloneCallback

Field Summary

Fields inherited from class harpoon.IR.Tree.Tree

arrayFactory, child

Fields inherited from interface harpoon.IR.Tree.Typed

DOUBLE, FLOAT, INT, LONG, POINTER

Constructor Summary

MOVE(TreeFactory tf, HCodeElement source, Exp dst, Exp src)
Constructor.

Method Summary

void	accept(TreeVisitor v) Accept a visitor
Stm	build(TreeFactory tf, ExpList kids)
Exp	getDst() Returns the expression giving the destination for the computed value.
Exp	getSrc() Returns the expression for the computed value.
boolean	isDoubleWord() Returns true if the expression corresponds to a 64-bit value.
boolean	isFloatingPoint() Returns true if the expression corresponds to a floating-point value.
ExpList	kids() Return a list of subexpressions of this Tree.
int	kind() Return an integer enumeration of the kind of this Tree.
Tree	rename(TreeFactory tf, TempMap tm, Tree.CloneCallback cb) Rename while cloning a subtree.
void	setDst(Exp dst) Sets the expression giving the destination for the computed value.
void	setSrc(Exp src) Sets the expression for the computed value.
String	toString()
int	type() Returns enumerated constant (INT, LONG, FLOAT, DOUBLE, or POINTER) corresponding to the type of the expression.

Methods inherited from class harpoon.IR.Tree.Stm

build, isNop, linearize, toStm

Methods inherited from class harpoon.IR.Tree.Tree

clone, clone, getChild, getFactory, getFirstChild, getID, getLineNumber, getParent, getSibling, getSourceFile, hashCode, rename, replace, setChild, unlink

Methods inherited from class java.lang.Object

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

Constructor Detail

MOVE

public MOVE(TreeFactory tf,
            HCodeElement source,
            Exp dst,
            Exp src)

Constructor.

The type of the src expression and of the dst expression must be identical. (Use a UNOP to convert, if they are necessary.)

Method Detail

getDst

public Exp getDst()

Returns the expression giving the destination for the computed value.

getSrc

public Exp getSrc()

Returns the expression for the computed value.

setDst

public void setDst(Exp dst)

Sets the expression giving the destination for the computed value.

setSrc

public void setSrc(Exp src)

Sets the expression for the computed value.

kind

public int kind()

Description copied from class: Tree

Return an integer enumeration of the kind of this Tree. The enumerated values are defined in TreeKind.

Specified by:

kind in class Tree

kids

public ExpList kids()

Description copied from class: Tree

Return a list of subexpressions of this Tree.

Overrides:

kids in class Tree

build

public Stm build(TreeFactory tf,
                 ExpList kids)

Specified by:

build in class Stm

accept

public void accept(TreeVisitor v)

Accept a visitor

Specified by:

accept in class Tree

rename

public Tree rename(TreeFactory tf,
                   TempMap tm,
                   Tree.CloneCallback cb)

Description copied from class: Tree

Rename while cloning a subtree. This node and all child nodes are cloned; the 'temp' information of all TEMP nodes are renamed according to the supplied TempMap. Note that Temps not belonging to this.getFactory().tempFactory() are not affected. The callback() method of the supplied CloneCallback is invoked once on each subtree cloned, starting from the leaves and working back to the root in a post-order depth-first manner.

Specified by:

rename in class Tree

type

public int type()

Description copied from interface: Typed

Returns enumerated constant (INT, LONG, FLOAT, DOUBLE, or POINTER) corresponding to the type of the expression.

Specified by:

type in interface Typed

Returns:

the type of dst expression.

isDoubleWord

public boolean isDoubleWord()

Description copied from interface: Typed

Returns true if the expression corresponds to a 64-bit value.

Specified by:

isDoubleWord in interface Typed

isFloatingPoint

public boolean isFloatingPoint()

Description copied from interface: Typed

Returns true if the expression corresponds to a floating-point value.

Specified by:

isFloatingPoint in interface Typed

toString

public String toString()

Overrides:

toString in class Object