1// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -fblocks -Wnull-arithmetic -verify -Wno-string-plus-int -Wno-tautological-pointer-compare %s
2#include <stddef.h>
3
4void f() {
5  int a;
6  bool b;
7  void (^c)();
8  class X;
9  void (X::*d) ();
10  extern void e();
11  int f[2];
12  const void *v;
13
14  a = 0 ? NULL + a : a + NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
15  a = 0 ? NULL - a : a - NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
16  a = 0 ? NULL / a : a / NULL; // expected-warning 2{{use of NULL in arithmetic operation}} \
17                               // expected-warning {{division by zero is undefined}}
18  a = 0 ? NULL * a : a * NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
19  a = 0 ? NULL >> a : a >> NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
20  a = 0 ? NULL << a : a << NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
21  a = 0 ? NULL % a : a % NULL; // expected-warning 2{{use of NULL in arithmetic operation}} \
22                                  expected-warning {{remainder by zero is undefined}}
23  a = 0 ? NULL & a : a & NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
24  a = 0 ? NULL | a : a | NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
25  a = 0 ? NULL ^ a : a ^ NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
26
27  // Check for warnings or errors when doing arithmetic on pointers and other
28  // types.
29  v = 0 ? NULL + &a : &a + NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
30  v = 0 ? NULL + c : c + NULL; // \
31    expected-error {{invalid operands to binary expression ('long' and 'void (^)()')}} \
32    expected-error {{invalid operands to binary expression ('void (^)()' and 'long')}}
33  v = 0 ? NULL + d : d + NULL; // \
34    expected-error {{invalid operands to binary expression ('long' and 'void (X::*)()')}} \
35    expected-error {{invalid operands to binary expression ('void (X::*)()' and 'long')}}
36  v = 0 ? NULL + e : e + NULL; // expected-error 2{{arithmetic on a pointer to the function type 'void ()'}}
37  v = 0 ? NULL + f : f + NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
38  v = 0 ? NULL + "f" : "f" + NULL; // expected-warning 2{{use of NULL in arithmetic operation}}
39
40  // Using two NULLs should only give one error instead of two.
41  a = NULL + NULL; // expected-warning{{use of NULL in arithmetic operation}}
42  a = NULL - NULL; // expected-warning{{use of NULL in arithmetic operation}}
43  a = NULL / NULL; // expected-warning{{use of NULL in arithmetic operation}} \
44                   // expected-warning{{division by zero is undefined}}
45  a = NULL * NULL; // expected-warning{{use of NULL in arithmetic operation}}
46  a = NULL >> NULL; // expected-warning{{use of NULL in arithmetic operation}}
47  a = NULL << NULL; // expected-warning{{use of NULL in arithmetic operation}}
48  a = NULL % NULL; // expected-warning{{use of NULL in arithmetic operation}} \
49                   // expected-warning{{remainder by zero is undefined}}
50  a = NULL & NULL; // expected-warning{{use of NULL in arithmetic operation}}
51  a = NULL | NULL; // expected-warning{{use of NULL in arithmetic operation}}
52  a = NULL ^ NULL; // expected-warning{{use of NULL in arithmetic operation}}
53
54  a += NULL; // expected-warning{{use of NULL in arithmetic operation}}
55  a -= NULL; // expected-warning{{use of NULL in arithmetic operation}}
56  a /= NULL; // expected-warning{{use of NULL in arithmetic operation}} \
57             // expected-warning{{division by zero is undefined}}
58  a *= NULL; // expected-warning{{use of NULL in arithmetic operation}}
59  a >>= NULL; // expected-warning{{use of NULL in arithmetic operation}}
60  a <<= NULL; // expected-warning{{use of NULL in arithmetic operation}}
61  a %= NULL; // expected-warning{{use of NULL in arithmetic operation}} \
62             // expected-warning{{remainder by zero is undefined}}
63  a &= NULL; // expected-warning{{use of NULL in arithmetic operation}}
64  a |= NULL; // expected-warning{{use of NULL in arithmetic operation}}
65  a ^= NULL; // expected-warning{{use of NULL in arithmetic operation}}
66
67  b = a < NULL || a > NULL; // expected-warning 2{{comparison between NULL and non-pointer ('int' and NULL)}}
68  b = NULL < a || NULL > a; // expected-warning 2{{comparison between NULL and non-pointer (NULL and 'int')}}
69  b = a <= NULL || a >= NULL; // expected-warning 2{{comparison between NULL and non-pointer ('int' and NULL)}}
70  b = NULL <= a || NULL >= a; // expected-warning 2{{comparison between NULL and non-pointer (NULL and 'int')}}
71  b = a == NULL || a != NULL; // expected-warning 2{{comparison between NULL and non-pointer ('int' and NULL)}}
72  b = NULL == a || NULL != a; // expected-warning 2{{comparison between NULL and non-pointer (NULL and 'int')}}
73
74  b = &a < NULL || NULL < &a || &a > NULL || NULL > &a;
75  b = &a <= NULL || NULL <= &a || &a >= NULL || NULL >= &a;
76  b = &a == NULL || NULL == &a || &a != NULL || NULL != &a;
77
78  b = 0 == a;
79  b = 0 == &a;
80
81  b = NULL < NULL || NULL > NULL;
82  b = NULL <= NULL || NULL >= NULL;
83  b = NULL == NULL || NULL != NULL;
84
85  b = ((NULL)) != a;  // expected-warning{{comparison between NULL and non-pointer (NULL and 'int')}}
86
87  // Check that even non-standard pointers don't warn.
88  b = c == NULL || NULL == c || c != NULL || NULL != c;
89  b = d == NULL || NULL == d || d != NULL || NULL != d;
90  b = e == NULL || NULL == e || e != NULL || NULL != e;
91  b = f == NULL || NULL == f || f != NULL || NULL != f;
92  b = "f" == NULL || NULL == "f" || "f" != NULL || NULL != "f";
93
94  return NULL; // expected-error{{void function 'f' should not return a value}}
95}
96