| // RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -fblocks -Wnull-arithmetic -verify -Wno-string-plus-int -Wno-tautological-pointer-compare %s |
| #include <stddef.h> |
| |
| void f() { |
| int a; |
| bool b; |
| void (^c)(); |
| class X; |
| void (X::*d) (); |
| extern void e(); |
| int f[2]; |
| const void *v; |
| |
| a = 0 ? NULL + a : a + NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| a = 0 ? NULL - a : a - NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| a = 0 ? NULL / a : a / NULL; // expected-warning 2{{use of NULL in arithmetic operation}} \ |
| // expected-warning {{division by zero is undefined}} |
| a = 0 ? NULL * a : a * NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| a = 0 ? NULL >> a : a >> NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| a = 0 ? NULL << a : a << NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| a = 0 ? NULL % a : a % NULL; // expected-warning 2{{use of NULL in arithmetic operation}} \ |
| expected-warning {{remainder by zero is undefined}} |
| a = 0 ? NULL & a : a & NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| a = 0 ? NULL | a : a | NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| a = 0 ? NULL ^ a : a ^ NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| |
| // Check for warnings or errors when doing arithmetic on pointers and other |
| // types. |
| v = 0 ? NULL + &a : &a + NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| v = 0 ? NULL + c : c + NULL; // \ |
| expected-error {{invalid operands to binary expression ('long' and 'void (^)()')}} \ |
| expected-error {{invalid operands to binary expression ('void (^)()' and 'long')}} |
| v = 0 ? NULL + d : d + NULL; // \ |
| expected-error {{invalid operands to binary expression ('long' and 'void (X::*)()')}} \ |
| expected-error {{invalid operands to binary expression ('void (X::*)()' and 'long')}} |
| v = 0 ? NULL + e : e + NULL; // expected-error 2{{arithmetic on a pointer to the function type 'void ()'}} |
| v = 0 ? NULL + f : f + NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| v = 0 ? NULL + "f" : "f" + NULL; // expected-warning 2{{use of NULL in arithmetic operation}} |
| |
| // Using two NULLs should only give one error instead of two. |
| a = NULL + NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a = NULL - NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a = NULL / NULL; // expected-warning{{use of NULL in arithmetic operation}} \ |
| // expected-warning{{division by zero is undefined}} |
| a = NULL * NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a = NULL >> NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a = NULL << NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a = NULL % NULL; // expected-warning{{use of NULL in arithmetic operation}} \ |
| // expected-warning{{remainder by zero is undefined}} |
| a = NULL & NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a = NULL | NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a = NULL ^ NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| |
| a += NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a -= NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a /= NULL; // expected-warning{{use of NULL in arithmetic operation}} \ |
| // expected-warning{{division by zero is undefined}} |
| a *= NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a >>= NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a <<= NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a %= NULL; // expected-warning{{use of NULL in arithmetic operation}} \ |
| // expected-warning{{remainder by zero is undefined}} |
| a &= NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a |= NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| a ^= NULL; // expected-warning{{use of NULL in arithmetic operation}} |
| |
| b = a < NULL || a > NULL; // expected-warning 2{{comparison between NULL and non-pointer ('int' and NULL)}} |
| b = NULL < a || NULL > a; // expected-warning 2{{comparison between NULL and non-pointer (NULL and 'int')}} |
| b = a <= NULL || a >= NULL; // expected-warning 2{{comparison between NULL and non-pointer ('int' and NULL)}} |
| b = NULL <= a || NULL >= a; // expected-warning 2{{comparison between NULL and non-pointer (NULL and 'int')}} |
| b = a == NULL || a != NULL; // expected-warning 2{{comparison between NULL and non-pointer ('int' and NULL)}} |
| b = NULL == a || NULL != a; // expected-warning 2{{comparison between NULL and non-pointer (NULL and 'int')}} |
| |
| b = &a < NULL || NULL < &a || &a > NULL || NULL > &a; // expected-error 4{{ordered comparison between pointer and zero}} |
| b = &a <= NULL || NULL <= &a || &a >= NULL || NULL >= &a; // expected-error 4{{ordered comparison between pointer and zero}} |
| b = &a == NULL || NULL == &a || &a != NULL || NULL != &a; |
| |
| b = 0 == a; |
| b = 0 == &a; |
| |
| b = NULL < NULL || NULL > NULL; |
| b = NULL <= NULL || NULL >= NULL; |
| b = NULL == NULL || NULL != NULL; |
| |
| b = ((NULL)) != a; // expected-warning{{comparison between NULL and non-pointer (NULL and 'int')}} |
| |
| // Check that even non-standard pointers don't warn. |
| b = c == NULL || NULL == c || c != NULL || NULL != c; |
| b = d == NULL || NULL == d || d != NULL || NULL != d; |
| b = e == NULL || NULL == e || e != NULL || NULL != e; |
| b = f == NULL || NULL == f || f != NULL || NULL != f; |
| b = "f" == NULL || NULL == "f" || "f" != NULL || NULL != "f"; |
| |
| return NULL; // expected-error{{void function 'f' should not return a value}} |
| } |