test/Analysis/reference.cpp

   1 // RUN: %clang_cc1 -analyze -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-constraints=range -verify %s
   2
   3 typedef typeof(sizeof(int)) size_t;
   4 void malloc (size_t);
   5
   6 void f1() {
   7   int const &i = 3;  // <--- **FIXME** This is currently not being modeled correctly.
   8   int b = i;
   9
  10   int *p = 0;
  11
  12   if (b != 3)
  13     *p = 1; // no-warning
  14 }
  15
  16 char* ptr();
  17 char& ref();
  18
  19 // These next two tests just shouldn't crash.
  20 char t1 () {
  21   ref() = 'c';
  22   return '0';
  23 }
  24
  25 // just a sanity test, the same behavior as t1()
  26 char t2 () {
  27   *ptr() = 'c';
  28   return '0';
  29 }
  30
  31 // Each of the tests below is repeated with pointers as well as references.
  32 // This is mostly a sanity check, but then again, both should work!
  33 char t3 () {
  34   char& r = ref();
  35   r = 'c'; // no-warning
  36   if (r) return r;
  37   return *(char*)0; // no-warning
  38 }
  39
  40 char t4 () {
  41   char* p = ptr();
  42   *p = 'c'; // no-warning
  43   if (*p) return *p;
  44   return *(char*)0; // no-warning
  45 }
  46
  47 char t5 (char& r) {
  48   r = 'c'; // no-warning
  49   if (r) return r;
  50   return *(char*)0; // no-warning
  51 }
  52
  53 char t6 (char* p) {
  54   *p = 'c'; // no-warning
  55   if (*p) return *p;
  56   return *(char*)0; // no-warning
  57 }