| 1 | // RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -Wextra -std=c11 |
|---|
| 2 | // RUN: %clang_cc1 %s -fsyntax-only -triple i686-unknown-unknown -verify -pedantic -Wextra -std=c11 |
|---|
| 3 | // RUN: %clang_cc1 %s -fsyntax-only -triple x86_64-unknown-unknown -verify -pedantic -Wextra -std=c11 |
|---|
| 4 | |
|---|
| 5 | #include <stdint.h> |
|---|
| 6 | |
|---|
| 7 | typedef struct S S; // expected-note 4 {{forward declaration of 'struct S'}} |
|---|
| 8 | extern _Atomic(S*) e; |
|---|
| 9 | void a(S* b, void* c) { |
|---|
| 10 | void (*fp)(int) = 0; |
|---|
| 11 | b++; // expected-error {{arithmetic on a pointer to an incomplete type}} |
|---|
| 12 | b += 1; // expected-error {{arithmetic on a pointer to an incomplete type}} |
|---|
| 13 | c++; // expected-warning {{arithmetic on a pointer to void is a GNU extension}} |
|---|
| 14 | c += 1; // expected-warning {{arithmetic on a pointer to void is a GNU extension}} |
|---|
| 15 | c--; // expected-warning {{arithmetic on a pointer to void is a GNU extension}} |
|---|
| 16 | c -= 1; // expected-warning {{arithmetic on a pointer to void is a GNU extension}} |
|---|
| 17 | (void) c[1]; // expected-warning {{subscript of a pointer to void is a GNU extension}} |
|---|
| 18 | b = 1+b; // expected-error {{arithmetic on a pointer to an incomplete type}} |
|---|
| 19 | /* The next couple tests are only pedantic warnings in gcc */ |
|---|
| 20 | void (*d)(S*,void*) = a; |
|---|
| 21 | d += 1; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}} |
|---|
| 22 | d++; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}} |
|---|
| 23 | d--; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}} |
|---|
| 24 | d -= 1; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}} |
|---|
| 25 | (void)(1 + d); // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}} |
|---|
| 26 | e++; // expected-error {{arithmetic on a pointer to an incomplete type}} |
|---|
| 27 | intptr_t i = (intptr_t)b; |
|---|
| 28 | char *f = (char*)0 + i; // expected-warning {{arithmetic on a null pointer treated as a cast from integer to pointer is a GNU extension}} |
|---|
| 29 | // Cases that don't match the GNU inttoptr idiom get a different warning. |
|---|
| 30 | f = (char*)0 - i; // expected-warning {{performing pointer arithmetic on a null pointer has undefined behavior}} |
|---|
| 31 | int *g = (int*)0 + i; // expected-warning {{performing pointer arithmetic on a null pointer has undefined behavior}} |
|---|
| 32 | } |
|---|
| 33 | |
|---|