private void computeCaches() {
cacheAllRegions = new ArrayList<RegionVar>();
cacheI2R = new HashMap<Integer, RegionVar>();
for (Node n : nodes) getRegionsHelper(n.getRep(), null, cacheAllRegions);
for (RegionVar r : cacheAllRegions) {
r.setIndex(++numRegions);
cacheI2R.put(r.getIndex(), r);
}
numRegions++;
}
