1/* Test for the "nonnull" function attribute.  */
2/* Origin: Jason Thorpe <thorpej@wasabisystems.com> */
3/* { dg-do compile } */
4/* { dg-options "-Wnonnull" } */
5
6#include <stddef.h>
7
8extern void func1 (char *, char *, int) __attribute__((nonnull));
9
10extern void func2 (char *, char *) __attribute__((nonnull(1)));
11
12extern void func3 (char *, int, char *, int)
13  __attribute__((nonnull(1,3)));
14
15extern void func4 (char *, char *) __attribute__((nonnull(1)))
16  __attribute__((nonnull(2)));
17
18void
19foo (int i1, int i2, int i3, char *cp1, char *cp2, char *cp3)
20{
21  func1(cp1, cp2, i1);
22
23  func1(NULL, cp2, i1); /* { dg-warning "null" "null with argless nonnull 1" } */
24  func1(cp1, NULL, i1); /* { dg-warning "null" "null with argless nonnull 2" } */
25  func1(cp1, cp2, 0);
26
27  func2(cp1, NULL);
28  func2(NULL, cp1); /* { dg-warning "null" "null with single explicit nonnull" } */
29
30  func3(NULL, i2, cp3, i3); /* { dg-warning "null" "null with explicit nonnull 1" } */
31  func3(cp3, i2, NULL, i3); /* { dg-warning "null" "null with explicit nonnull 3" } */
32
33  func1(i1 ? cp1 : NULL, cp2, i3); /* { dg-warning "null" "null with cond expr rhs" } */
34  func1(i1 ? NULL : cp1, cp2, i3); /* { dg-warning "null" "null with cond expr lhs" } */
35  func1(i1 ? (i2 ? cp1 : NULL) : cp2, cp3, i3); /* { dg-warning "null" "null with nested cond expr" } */
36
37  func4(NULL, cp1); /* { dg-warning "null" "null with multiple attributes 1" } */
38  func4(cp1, NULL); /* { dg-warning "null" "null with multiple attributes 2" } */
39}
40