Class LocalExpr

java.lang.Object

EDU.purdue.cs.bloat.tree.Node

EDU.purdue.cs.bloat.tree.Expr

EDU.purdue.cs.bloat.tree.DefExpr

EDU.purdue.cs.bloat.tree.MemExpr

EDU.purdue.cs.bloat.tree.VarExpr

EDU.purdue.cs.bloat.tree.LocalExpr

All Implemented Interfaces:

LeafExpr, Cloneable

public class LocalExpr
extends VarExpr
implements LeafExpr

LocalExpr represents an expression that accesses a variable in a method's local variable table. Note that during register allocation the index becomes the color that the LocalExpr (variable) is assigned.

See Also:

• Tree.newStackLocal(int, Type)
• Tree.newLocal(Type)

Field Summary

Fields inherited from class Expr

type

Fields inherited from class Node

parent

Constructor Summary

Constructors

Constructor	Description
LocalExpr(int index, boolean fromStack, Type type)	Constructor.
LocalExpr(int index, Type type)	Constructor.

Method Summary

Modifier and Type	Method	Description
Object	clone()
boolean	equalsExpr(Expr other)	Compares this expression to another.
int	exprHashCode()	Returns the hash code for this expresion.
boolean	fromStack()
boolean	isReturnAddress()	Returns true if the type of this expression is a return address.
void	visit(TreeVisitor visitor)
void	visitForceChildren(TreeVisitor visitor)	Visit the children of this node.

Methods inherited from class VarExpr

def, index, setIndex

Methods inherited from class DefExpr

addUse, cleanupOnly, hasUse, isDef, removeUse, uses, version

Methods inherited from class Expr

comparator, copyInto, setDef, setType, stmt, type

Methods inherited from class Node

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

Methods inherited from class Object

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

Constructor Details

LocalExpr

public LocalExpr(int index,
 boolean fromStack,
 Type type)

Constructor.

Parameters:

index - Index into the local variable table for this expression.

fromStack - Is the local allocated on the stack?

type - The type of this expression

LocalExpr

public LocalExpr(int index,
 Type type)

Constructor. LocalExpr is not allocated on the stack.

Parameters:

index - Index into the local variable table for this expression.

type - The type of this expression.

Method Details

fromStack

public boolean fromStack()

isReturnAddress

public boolean isReturnAddress()

Returns true if the type of this expression is a return address.

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

equalsExpr

public boolean equalsExpr(Expr other)

Description copied from class: Expr

Compares this expression to another.

Specified by:

equalsExpr in class Expr

Parameters:

other - The other expression to compare against.

exprHashCode

public int exprHashCode()

Description copied from class: Expr

Returns the hash code for this expresion.

Specified by:

exprHashCode in class Expr

clone

public Object clone()

Specified by:

clone in class Expr