org.jikesrvm.compilers.opt.lir2mir

Class BURS_IntConstantTreeNode

java.lang.Object

org.jikesrvm.compilers.opt.lir2mir.AbstractBURS_TreeNode

org.jikesrvm.compilers.opt.lir2mir.BURS_IntConstantTreeNode

final class BURS_IntConstantTreeNode
extends AbstractBURS_TreeNode

A subclass of BURS_TreeNode for an IntConstantOperand.

It is very common for us to want to access the value of an int constant during BURS, so we make it easy to do so by creating a special kind of node.

Field Summary

Fields

Modifier and Type	Field and Description
private AbstractBURS_TreeNode	delegate Where costs and rules are stored
(package private) int	value The int constant value associated with this tree node

Fields inherited from class org.jikesrvm.compilers.opt.lir2mir.AbstractBURS_TreeNode

child1, child2, dg_node

Constructor Summary

Constructors

Constructor and Description
BURS_IntConstantTreeNode(int val) Constructor for interior node.

Method Summary

Modifier and Type	Method and Description
char	getCost(int goalNT)
void	initCost()
int	readPacked(int word, int shift, int mask)
int	rule(int goalNT) Gets the BURS rule number associated with this tree node for a given non-terminal
void	setCost(int goalNT, char cost)
String	toString()
void	writePacked(int word, int mask, int shiftedValue)

Methods inherited from class org.jikesrvm.compilers.opt.lir2mir.AbstractBURS_TreeNode

create, create, getChild1, getChild2, getInstruction, getInstructionString, getNonTerminal, getOpcode, isREGISTERNode, isSuperNodeRoot, isTreeRoot, numRegisters, setChild1, setChild2, setNonTerminal, setNumRegisters, setTreeRoot

Methods inherited from class java.lang.Object

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

Field Detail

value

final int value

The int constant value associated with this tree node

delegate

private final AbstractBURS_TreeNode delegate

Where costs and rules are stored

Constructor Detail

BURS_IntConstantTreeNode

BURS_IntConstantTreeNode(int val)

Constructor for interior node.

Parameters:

val - a constant int value

Method Detail

toString

public String toString()

Overrides:

toString in class AbstractBURS_TreeNode

rule

public int rule(int goalNT)

Gets the BURS rule number associated with this tree node for a given non-terminal

Specified by:

rule in class AbstractBURS_TreeNode

Parameters:

goalNT - the non-terminal we want to know the rule for (e.g. stm_NT)

Returns:

the rule number

getCost

public char getCost(int goalNT)

Specified by:

getCost in class AbstractBURS_TreeNode

setCost

public void setCost(int goalNT,
                    char cost)

Specified by:

setCost in class AbstractBURS_TreeNode

initCost

public void initCost()

Specified by:

initCost in class AbstractBURS_TreeNode

writePacked

public void writePacked(int word,
                        int mask,
                        int shiftedValue)

Specified by:

writePacked in class AbstractBURS_TreeNode

readPacked

public int readPacked(int word,
                      int shift,
                      int mask)

Specified by:

readPacked in class AbstractBURS_TreeNode