return new NormalCachingCallSite(name);
} else {
if (name.equals("+")) {
return new PlusCallSite();
} else if (name.equals("-")) {
return new MinusCallSite();
} else if (name.equals("*")) {
return new MulCallSite();
} else if (name.equals("/")) {
return new DivCallSite();
} else if (name.equals("<")) {