Package EDU.purdue.cs.bloat.tree

Class PhiCatchStmt

java.lang.Object

EDU.purdue.cs.bloat.tree.Node

EDU.purdue.cs.bloat.tree.Stmt

EDU.purdue.cs.bloat.tree.PhiStmt

EDU.purdue.cs.bloat.tree.PhiCatchStmt

All Implemented Interfaces:

Assign

public class PhiCatchStmt
extends PhiStmt

A PhiCatchStmt is used to handle variables that are used inside an exception handler. Inside a try block a variable may be used several times. It may be updated, may be invovled in a phi-function, etc. A PhiCatchStmt is placed at the beginning of each expection handling (catch) block to factor together the variables that are live within the protected region.

Field Summary

Fields inherited from class EDU.purdue.cs.bloat.tree.Node

parent

Constructor Summary

Constructors

Constructor	Description
PhiCatchStmt(LocalExpr target)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	addOperand(LocalExpr operand)	Add a local variable to the operand list for this phi-function.
boolean	hasOperandDef(LocalExpr def)	Searches the list of operands for a local variable.
int	numOperands()	Returns the number of operands to this phi-function.
Expr	operandAt(int i)	Returns the operand at a given index.
java.util.Collection	operands()	Returns the operands to this phi-function.
void	setOperandAt(int i, Expr expr)	Sets the value of one of this phi-function's operands.
void	visit(TreeVisitor visitor)
void	visitForceChildren(TreeVisitor visitor)	Visit the children of this node.

Methods inherited from class EDU.purdue.cs.bloat.tree.Node

block, cleanup, copyInto, hasParent, key, parent, replaceWith, replaceWith, setKey, setParent, setValueNumber, toString, valueNumber, visitChildren, visitOnly

Methods inherited from class java.lang.Object

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

Methods inherited from class EDU.purdue.cs.bloat.tree.PhiStmt

clone, defs, target

Methods inherited from class EDU.purdue.cs.bloat.tree.Stmt

cleanupOnly

Constructor Detail

PhiCatchStmt

public PhiCatchStmt(LocalExpr target)

Constructor.

Parameters:

target - Local variable to which the result of this phi-function is to be assigned.

Method Detail

visitForceChildren

public void visitForceChildren(TreeVisitor visitor)

Description copied from class: Node

Visit the children of this node. Not all Nodes will have children to visit.

Specified by:

visitForceChildren in class Node

visit

public void visit(TreeVisitor visitor)

Specified by:

visit in class Node

hasOperandDef

public boolean hasOperandDef(LocalExpr def)

Searches the list of operands for a local variable.

Parameters:

def - The local variable definition to search for.

Returns:

True, if def is found, otherwise, false.

addOperand

public void addOperand(LocalExpr operand)

Add a local variable to the operand list for this phi-function.

Parameters:

operand - An operand of this phi-function.

operands

public java.util.Collection operands()

Returns the operands to this phi-function.

Specified by:

operands in class PhiStmt

numOperands

public int numOperands()

Returns the number of operands to this phi-function.

setOperandAt

public void setOperandAt(int i,
                         Expr expr)

Sets the value of one of this phi-function's operands.

Parameters:

i - The number parameter to set.

expr - The new value of the parameter.

operandAt

public Expr operandAt(int i)

Returns the operand at a given index.