clang/test/Analysis/loop-widening-preserve-reference-type.cpp

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,unix.Malloc,debug.ExprInspection -analyzer-max-loop 4 -analyzer-config widen-loops=true -verify %s
   2
   3 void clang_analyzer_eval(int);
   4
   5 struct A {
   6   ~A() {}
   7 };
   8 struct B : public A {};
   9
  10 void invalid_type_region_access() {
  11   const A &x = B();
  12   for (int i = 0; i < 10; ++i) { }
  13   clang_analyzer_eval(&x != 0); // expected-warning{{TRUE}}
  14 }                               // expected-warning@-1{{reference cannot be bound to dereferenced null pointer in well-defined C++ code; comparison may be assumed to always evaluate to true}}
  15
  16 using AR = const A &;
  17 void invalid_type_alias_region_access() {
  18   AR x = B();
  19   for (int i = 0; i < 10; ++i) {
  20   }
  21   clang_analyzer_eval(&x != 0); // expected-warning{{TRUE}}
  22 } // expected-warning@-1{{reference cannot be bound to dereferenced null pointer in well-defined C++ code; comparison may be assumed to always evaluate to true}}