private int[][] getDDVec(Table<Declaration, SubscriptExpr> arrayRefs, int loopDepth) {
if (arrayRefs == null) return new int[0][0];
int numEdges = 0;
Stack<DDEdge> wl = WorkArea.<DDEdge>getStack("g<SubscriptExpr>etDDVec");
Enumeration<DDEdge> k = graph.getEdges();
while (k.hasMoreElements()) { // Check out every array variable in the loop nest.
DDEdge edge = k.nextElement();
if (edge.isSpatial()) continue;
if (edge.isLoopIndependentDependency()) continue;
if (edge.representsAllInput()) continue;
wl.push(edge);
numEdges++;
}
int[][] DDVector = new int[numEdges][loopDepth];
int i = 0;
while (!wl.empty()) {
DDEdge edge = wl.pop();
if (trace) System.out.println(" edge " + edge);
// Find dependence distance.
for (int level = 1; level <= loopDepth; level++)
DDVector[i][level - 1] = edge.getDistance(level);
if (trace) {
System.out.print(i);
System.out.print(" ");
System.out.println(edge);
}
i++;
}
WorkArea.<DDEdge>returnStack(wl);
return DDVector;
}
