harpoon.IR.Tree
Class INVOCATION

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

All Implemented Interfaces:

HCodeElement

Direct Known Subclasses:

CALL, NATIVECALL

public abstract class INVOCATION
extends Stm

INVOCATION objects are statements which stand for procedure calls. The return value of the CALL is stored in retval. If the call throws an exception, the exception object will be placed in retex. The retval field will be null if the called procedure has void return type.

Version:

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

Author:

Duncan Bryce <duncan@lcs.mit.edu>, based on Modern Compiler Implementation in Java by Andrew Appel.

See Also:

CALL, CALL, NATIVECALL

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

Constructor Summary

protected

INVOCATION(TreeFactory tf, HCodeElement source, TEMP retval, Exp func, ExpList args, int addlArgs) Constructor.

Method Summary

abstract void	accept(TreeVisitor v) Accept a visitor.
ExpList	getArgs() Returns a list of subexpressions for the function arguments.
Exp	getFunc() Returns an expression for the function reference to invoke.
TEMP	getRetval() Returns the expression indicating the destination of the return value.
abstract boolean	isNative()
ExpList	kids() Return a list of subexpressions of this Tree.
void	setArgs(ExpList args) Sets the function argument list.
void	setFunc(Exp func) Sets the function reference expression.
void	setRetval(TEMP retval) Sets the expression indicating the destination of the return value.

Methods inherited from class harpoon.IR.Tree.Stm

build, build, isNop, linearize, toStm

Methods inherited from class harpoon.IR.Tree.Tree

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

Methods inherited from class java.lang.Object

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

Constructor Detail

INVOCATION

protected INVOCATION(TreeFactory tf,
                     HCodeElement source,
                     TEMP retval,
                     Exp func,
                     ExpList args,
                     int addlArgs)

Constructor.

Parameters:

retval - Expression indicating the destination of the return value. The retval is null for void functions.

func - A subexpression which evaluates to the function reference to invoke.

args - Subexpressions for the arguments to the function.

Method Detail

getRetval

public TEMP getRetval()

Returns the expression indicating the destination of the return value. Returns null for void functions.

getFunc

public Exp getFunc()

Returns an expression for the function reference to invoke.

getArgs

public ExpList getArgs()

Returns a list of subexpressions for the function arguments.

kids

public ExpList kids()

Description copied from class: Tree

Return a list of subexpressions of this Tree.

Overrides:

kids in class Tree

setRetval

public void setRetval(TEMP retval)

Sets the expression indicating the destination of the return value.

Parameters:

retval - null for void functions, non-null otherwise.

setFunc

public void setFunc(Exp func)

Sets the function reference expression.

setArgs

public void setArgs(ExpList args)

Sets the function argument list.

isNative

public abstract boolean isNative()

accept

public abstract void accept(TreeVisitor v)

Description copied from class: Tree

Accept a visitor.

Specified by:

accept in class Tree