1// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
2
3int* ret_local() {
4  int x = 1;
5  return &x; // expected-warning {{address of stack memory}}
6}
7
8int* ret_local_array() {
9  int x[10];
10  return x; // expected-warning {{address of stack memory}}
11}
12
13int* ret_local_array_element(int i) {
14  int x[10];
15  return &x[i]; // expected-warning {{address of stack memory}}
16}
17
18int *ret_local_array_element_reversed(int i) {
19  int x[10];
20  return &i[x]; // expected-warning {{address of stack memory}}
21}
22
23int* ret_local_array_element_const_index() {
24  int x[10];
25  return &x[2];  // expected-warning {{address of stack memory}}
26}
27
28int& ret_local_ref() {
29  int x = 1;
30  return x;  // expected-warning {{reference to stack memory}}
31}
32
33int* ret_local_addrOf() {
34  int x = 1;
35  return &*&x; // expected-warning {{address of stack memory}}
36}
37
38int* ret_local_addrOf_paren() {
39  int x = 1;
40  return (&(*(&x))); // expected-warning {{address of stack memory}}
41}
42
43int* ret_local_addrOf_ptr_arith() {
44  int x = 1;
45  return &*(&x+1); // expected-warning {{address of stack memory}}
46}
47
48int* ret_local_addrOf_ptr_arith2() {
49  int x = 1;
50  return &*(&x+1); // expected-warning {{address of stack memory}}
51}
52
53int* ret_local_field() {
54  struct { int x; } a;
55  return &a.x; // expected-warning {{address of stack memory}}
56}
57
58int& ret_local_field_ref() {
59  struct { int x; } a;
60  return a.x; // expected-warning {{reference to stack memory}}
61}
62
63int* ret_conditional(bool cond) {
64  int x = 1;
65  int y = 2;
66  return cond ? &x : &y; // expected-warning {{address of stack memory}}
67}
68
69int* ret_conditional_rhs(int *x, bool cond) {
70  int y = 1;
71  return cond ? x : &y;  // expected-warning {{address of stack memory}}
72}
73
74void* ret_c_cast() {
75  int x = 1;
76  return (void*) &x;  // expected-warning {{address of stack memory}}
77}
78
79int* ret_static_var() {
80  static int x = 1;
81  return &x;  // no warning.
82}
83
84int z = 1;
85
86int* ret_global() {
87  return &z;  // no warning.
88}
89
90int* ret_parameter(int x) {
91  return &x;  // expected-warning {{address of stack memory}}
92}
93
94
95void* ret_cpp_static_cast(short x) {
96  return static_cast<void*>(&x); // expected-warning {{address of stack memory}}
97}
98
99int* ret_cpp_reinterpret_cast(double x) {
100  return reinterpret_cast<int*>(&x); // expected-warning {{address of stack me}}
101}
102
103int* ret_cpp_reinterpret_cast_no_warning(long x) {
104  return reinterpret_cast<int*>(x); // no-warning
105}
106
107int* ret_cpp_const_cast(const int x) {
108  return const_cast<int*>(&x);  // expected-warning {{address of stack memory}}
109}
110
111struct A { virtual ~A(); }; struct B : A {};
112A* ret_cpp_dynamic_cast(B b) {
113  return dynamic_cast<A*>(&b); // expected-warning {{address of stack memory}}
114}
115
116// PR 7999 - handle the case where a field is itself a reference.
117template <typename T> struct PR7999 {
118  PR7999(T& t) : value(t) {}
119  T& value;
120};
121
122struct PR7999_X {};
123
124PR7999_X& PR7999_f(PR7999<PR7999_X> s) { return s.value; } // no-warning
125void test_PR7999(PR7999_X& x) { (void)PR7999_f(x); } // no-warning
126
127// PR 8774: Don't try to evaluate parameters with default arguments like
128// variables with an initializer, especially in templates where the default
129// argument may not be an expression (yet).
130namespace PR8774 {
131  template <typename U> struct B { };
132  template <typename V> V f(typename B<V>::type const &v = B<V>::value()) {
133    return v;
134  }
135  template <> struct B<const char *> {
136    typedef const char *type;
137    static const char *value();
138  };
139  void g() {
140    const char *t;
141    f<const char*>(t);
142  }
143}
144
145// Don't warn about returning a local variable from a surrounding function if
146// we're within a lambda-expression.
147void ret_from_lambda() {
148  int a;
149  int &b = a;
150  (void) [&]() -> int& { return a; };
151  (void) [&]() -> int& { return b; };
152  (void) [=]() mutable -> int& { return a; };
153  (void) [=]() mutable -> int& { return b; };
154  (void) [&]() -> int& { int a; return a; }; // expected-warning {{reference to stack}}
155  (void) [=]() -> int& { int a; return a; }; // expected-warning {{reference to stack}}
156  (void) [&]() -> int& { int &a = b; return a; };
157  (void) [=]() mutable -> int& { int &a = b; return a; };
158}
159