EDU.purdue.cs.bloat.editor

Class Label

java.lang.Object

EDU.purdue.cs.bloat.editor.Label

public class Label
extends java.lang.Object

Label is used to label an instruction. Labels are used to preserve the location of branch targets. A Label consists of an index into the code array and a boolean that determines whether or not it starts a basic block.

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	TRACE

Constructor Summary

Constructors

Constructor and Description
Label(int index) Constructor.
Label(int index, boolean startsBlock) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) Check if an object is equal to this label.
int	hashCode() Hash the label.
int	index() Get the index of the label.
void	setComment(java.lang.String comment) Sets the comment associated with this Label.
void	setStartsBlock(boolean startsBlock) Set if the label starts a block.
boolean	startsBlock() Check if the label starts a block.
java.lang.String	toString() Convert the label to a string.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

TRACE

public static boolean TRACE

Constructor Detail

Label

public Label(int index)

Constructor.

Parameters:

index - A unique index for the label. For instance, its offset in the instruction array.

Label

public Label(int index,
     boolean startsBlock)

Constructor.

Parameters:

index - The index of this label into the instruction array

startsBlock - True if the label is the first instruction in a basic block, false if not.

Method Detail

setComment

public void setComment(java.lang.String comment)

Sets the comment associated with this Label.

setStartsBlock

public void setStartsBlock(boolean startsBlock)

Set if the label starts a block.

Parameters:

startsBlock - True if the label starts a block, false if not.

startsBlock

public boolean startsBlock()

Check if the label starts a block.

Returns:

True if the label starts a block, false if not.

index

public int index()

Get the index of the label.

Returns:

The index of the label.

hashCode

public int hashCode()

Hash the label.

Overrides:

hashCode in class java.lang.Object

Returns:

The hash code.

equals

public boolean equals(java.lang.Object obj)

Check if an object is equal to this label.

Overrides:

equals in class java.lang.Object

Parameters:

obj - The object to compare against.

Returns:

true if equal, false if not.

toString

public java.lang.String toString()

Convert the label to a string.

Overrides:

toString in class java.lang.Object

Returns:

A string representation of the label.