/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Common Public License (CPL);
* 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/cpl1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.jikesrvm.osr;
import java.util.LinkedList;
import java.util.ListIterator;
import org.jikesrvm.compilers.opt.ir.OPT_Instruction;
/**
* OSR_VariableMap, non-encoded yet
* OSR_VariableMap ---> LinkedList of OSR_VariableMapElement
* OSR_VariableMapElement ---> (OsrPoint, LinkedList of MethodVariables)
* OSR_MethodVariables ---> (Method, PC, List of LocalRegTuple)
* LocalRegTuple ---> ( LocalNum, regOp, Type ) or ( StackNum, regOp, Type )
* *
*/
public final class OSR_VariableMap {
/* A list of OSR_VariableMapElement */
public LinkedList<OSR_VariableMapElement> list = new LinkedList<OSR_VariableMapElement>();
public int getNumberOfElements() {
return list.size();
}
/*
* Inserts a new entry into the GCIRMap
* @param inst the IR instruction we care about
* @param mvarList the set of symbolic registers as a list
*/
public void insert(OPT_Instruction inst, LinkedList<OSR_MethodVariables> mvarList) {
// make a VariableMapElement and put it on the big list
list.add(new OSR_VariableMapElement(inst, mvarList));
}
/**
* Inserts a new entry at the begin of the list.
*/
public void insertFirst(OPT_Instruction inst, LinkedList<OSR_MethodVariables> mvarList) {
list.addFirst(new OSR_VariableMapElement(inst, mvarList));
}
/**
* Creates and returns an enumerator for this object
* @return an iterator for this object
*/
public ListIterator<OSR_VariableMapElement> iterator() {
return list.listIterator(0);
}
/**
* @return string version of this object
*/
public String toString() {
StringBuilder buf = new StringBuilder("");
if (list.isEmpty()) {
buf.append("empty");
} else {
for (OSR_VariableMapElement ptr : list) {
buf.append(ptr.toString());
}
}
return buf.toString();
}
}