org.jikesrvm.compilers.opt.regalloc

Class GenericRegisterPreferences

java.lang.Object

org.jikesrvm.compilers.opt.regalloc.GenericRegisterPreferences

Direct Known Subclasses:

RegisterPreferences

public abstract class GenericRegisterPreferences
extends Object

This class helps manage register preferences for coalescing and register allocation.

Field Summary

Fields

Modifier and Type	Field and Description
private CoalesceGraph	graph The main backing data structure;

Constructor Summary

Constructors

Constructor and Description
GenericRegisterPreferences()

Method Summary

Modifier and Type	Method and Description
protected void	addAffinity(int w, Register r1, Register r2) Adds a affinity of weight w between two registers.
CoalesceGraph	getGraph()
abstract void	initialize(IR ir) Sets up register preferences for an IR.

Methods inherited from class java.lang.Object

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

Field Detail

graph

private final CoalesceGraph graph

The main backing data structure;

Constructor Detail

GenericRegisterPreferences

public GenericRegisterPreferences()

Method Detail

addAffinity

protected void addAffinity(int w,
                           Register r1,
                           Register r2)

Adds a affinity of weight w between two registers.

Parameters:

w - the affinity

r1 - the first register

r2 - the second register

initialize

public abstract void initialize(IR ir)

Sets up register preferences for an IR. This is machine-dependent.

Parameters:

ir - the IR

getGraph

public CoalesceGraph getGraph()

Returns:

the backing graph holding the preferences.