public static boolean maybeSameLocation(Value v1, Value v2) {
if (!(v1 instanceof InstanceFieldRef && v2 instanceof InstanceFieldRef)
&& !(v1 instanceof ArrayRef && v2 instanceof ArrayRef)) {
return v1.equivTo(v2);
}
if (v1 instanceof InstanceFieldRef && v2 instanceof InstanceFieldRef) {
InstanceFieldRef ifr1 = (InstanceFieldRef) v1;
InstanceFieldRef ifr2 = (InstanceFieldRef) v2;
if (!ifr1.getField().getName().equals(ifr2.getField().getName())) return false;
Local base1 = (Local) ifr1.getBase();
Local base2 = (Local) ifr2.getBase();
PointsToAnalysis pta = Scene.v().getPointsToAnalysis();
PointsToSet pts1 = pta.reachingObjects(base1);
PointsToSet pts2 = pta.reachingObjects(base2);
return pts1.hasNonEmptyIntersection(pts2);
} else { // v1 instanceof ArrayRef && v2 instanceof ArrayRef
ArrayRef ar1 = (ArrayRef) v1;
ArrayRef ar2 = (ArrayRef) v2;
Local base1 = (Local) ar1.getBase();
Local base2 = (Local) ar2.getBase();
PointsToAnalysis pta = Scene.v().getPointsToAnalysis();
PointsToSet pts1 = pta.reachingObjects(base1);
PointsToSet pts2 = pta.reachingObjects(base2);
return pts1.hasNonEmptyIntersection(pts2);
}
}
private int numMatchArgs(int numFormals, UnchangedParamsAnalysis mrpa, Stmt s) {
FlowSet before = (FlowSet) mrpa.getFlowBefore(s);
List args = ((InvokeExpr) s.getInvokeExpr()).getArgs();
int matchArg = 0;
for (int i = 0; i < numFormals; i++) {
Value arg = (Value) args.get(i);
for (Iterator rppIt = before.iterator(); rppIt.hasNext(); ) {
IDValuePair rpp = (IDValuePair) rppIt.next();
if (rpp.groupID == i && arg.equivTo(rpp.value)) {
matchArg++;
break;
}
}
}
return matchArg;
}