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 | |
4 | void 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; // expected-error 4{{ordered comparison between pointer and zero}} |
75 | b = &a <= NULL || NULL <= &a || &a >= NULL || NULL >= &a; // expected-error 4{{ordered comparison between pointer and zero}} |
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 | |