1.2.2.1. alpha.core.CallAndMessageUnInitRefArg (C, C++, ObjC)
Check for logical errors for function calls and Objective-C message expressions (e.g., uninitialized arguments, null function pointers, and pointer to undefined variables).

Examples:

void test(void) {
  int t;
  int &p = t;
  int &s = p;
  int &q = s;
  foo(q); // warn
}

void test(void) {
  int x;
  foo(&x); // warn
}