/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.jikesrvm.compilers.opt.regalloc;
import org.jikesrvm.compilers.opt.ir.IR;
import org.jikesrvm.compilers.opt.ir.Register;
/**
* This class helps manage register preferences for coalescing and
* register allocation.
*/
public abstract class GenericRegisterPreferences {
/**
* The main backing data structure;
*/
private final CoalesceGraph graph = new CoalesceGraph();
/**
* Adds a affinity of weight w between two registers.
*
* @param w the affinity
* @param r1 the first register
* @param r2 the second register
*/
protected void addAffinity(int w, Register r1, Register r2) {
graph.addAffinity(w, r1, r2);
}
/**
* Sets up register preferences for an IR. This is machine-dependent.
*
* @param ir the IR
*/
public abstract void initialize(IR ir);
/**
* @return the backing graph holding the preferences.
*/
public CoalesceGraph getGraph() {
return graph;
}
}