public Iterator<CGNode> getPredNodes(CGNode N) {
IntSet s = getPredNodeNumbers(N);
if (s == null) {
return EmptyIterator.instance();
} else {
return new IntMapIterator<CGNode>(s.intIterator(), toNode);
}
}
/** check that the types of all instance keys are assignable to declared type of pointer key */
private void checkTypes(IntSet b) {
assert PARANOID;
if (b == null) return;
if (!(pointerKey instanceof LocalPointerKey)) {
return;
}
final LocalPointerKey lpk = (LocalPointerKey) pointerKey;
CGNode node = lpk.getNode();
final IClassHierarchy cha = node.getClassHierarchy();
final IR ir = node.getIR();
if (ir == null) return;
TypeInference ti = TypeInference.make(ir, false);
final IClass type = ti.getType(lpk.getValueNumber()).getType();
if (type == null) return;
// don't perform checking for exception variables
if (cha.isAssignableFrom(cha.lookupClass(TypeReference.JavaLangThrowable), type)) {
return;
}
b.foreach(
new IntSetAction() {
public void act(int x) {
InstanceKey ik = instanceKeys.getMappedObject(x);
IClass concreteType = ik.getConcreteType();
if (!cha.isAssignableFrom(type, concreteType)) {
System.err.println("BOOM");
System.err.println(ir);
System.err.println(lpk + " type " + type);
System.err.println(ik + " type " + concreteType);
Assertions.UNREACHABLE();
}
}
});
}
protected Set<CGNode> getPossibleTargets(CallSiteReference site) {
Object result = targets.get(site.getProgramCounter());
if (result == null) {
return Collections.emptySet();
} else if (result instanceof CGNode) {
Set<CGNode> s = Collections.singleton((CGNode) result);
return s;
} else {
IntSet s = (IntSet) result;
HashSet<CGNode> h = HashSetFactory.make(s.size());
for (IntIterator it = s.intIterator(); it.hasNext(); ) {
h.add(getCallGraph().getNode(it.next()));
}
return h;
}
}