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/* PR c/102103 - missing warning comparing array address to null
{ dg-do compile }
{ dg-options "-Wall" } */
typedef __INTPTR_TYPE__ intptr_t;
typedef __UINTPTR_TYPE__ uintptr_t;
#ifndef __cplusplus
# define bool _Bool
#endif
struct S { void *p, *a1[2], *a2[2][2]; } s, *p;
extern const void *a1[2];
extern void *a2[2][2], *ax[];
void T (bool);
void test_array_eq_0 (int i)
{
// Verify that casts intptr_t suppress the warning.
T ((intptr_t)a1 == 0);
T ((uintptr_t)a1 == 0);
T (a1 == 0); // { dg-warning "-Waddress" }
T (0 == &a1); // { dg-warning "-Waddress" }
// Verify that casts to other pointer types don't suppress it.
T ((void *)a1 == 0); // { dg-warning "-Waddress" }
T ((char *)a1 == 0); // { dg-warning "-Waddress" }
T (a1[0] == 0);
T (0 == (intptr_t)&a1[0]);
T (0 == &a1[0]); // { dg-warning "-Waddress" }
T (a1[i] == 0);
T (0 == (uintptr_t)&a1[i]);
T (0 == &a1[i]); // { dg-warning "-Waddress" }
T ((intptr_t)a2 == 0);
T (a2 == 0); // { dg-warning "-Waddress" }
T (0 == &a2); // { dg-warning "-Waddress" }
T (a2[0] == 0); // { dg-warning "-Waddress" }
T (0 == &a1[0]); // { dg-warning "-Waddress" }
T (a2[i] == 0); // { dg-warning "-Waddress" }
T (0 == &a2[i]); // { dg-warning "-Waddress" }
T (a2[0][0] == 0);
T (0 == &a2[0][0]); // { dg-warning "-Waddress" }
T (&ax == 0); // { dg-warning "-Waddress" }
T (0 == &ax); // { dg-warning "-Waddress" }
T (&ax[0] == 0); // { dg-warning "-Waddress" }
T (0 == ax[0]);
}
void test_array_neq_0 (int i)
{
// Verify that casts to intptr_t suppress the warning.
T ((uintptr_t)a1);
T (a1); // { dg-warning "-Waddress" }
T ((void *)a1); // { dg-warning "-Waddress" }
T (&a1 != 0); // { dg-warning "-Waddress" }
T (a1[0]);
T (&a1[0] != 0); // { dg-warning "-Waddress" }
T (a1[i]);
T (&a1[i] != 0); // { dg-warning "-Waddress" }
T ((intptr_t)a2);
T (a2); // { dg-warning "-Waddress" }
T ((void *)a2); // { dg-warning "-Waddress" }
T ((char *)a2); // { dg-warning "-Waddress" }
T (&a2 != 0); // { dg-warning "-Waddress" }
T (a2[0]); // { dg-warning "-Waddress" }
T (&a1[0] != 0); // { dg-warning "-Waddress" }
T (a2[i]); // { dg-warning "-Waddress" }
T (&a2[i] != 0); // { dg-warning "-Waddress" }
T (a2[0][0]);
T (&a2[0][0] != 0); // { dg-warning "-Waddress" }
}
void test_member_array_eq_0 (int i)
{
// Verify that casts to intptr_t suppress the warning.
T ((intptr_t)s.a1 == 0);
T (s.a1 == 0); // { dg-warning "-Waddress" }
T (0 == &a1); // { dg-warning "-Waddress" }
T (s.a1[0] == 0);
T ((void*)s.a1); // { dg-warning "-Waddress" }
T (0 == &a1[0]); // { dg-warning "-Waddress" }
T (s.a1[i] == 0);
T (0 == &a1[i]); // { dg-warning "-Waddress" }
T ((uintptr_t)s.a2 == 0);
T (s.a2 == 0); // { dg-warning "-Waddress" }
T (0 == &a2); // { dg-warning "-Waddress" }
T ((void *)s.a2 == 0);// { dg-warning "-Waddress" }
T (s.a2[0] == 0); // { dg-warning "-Waddress" }
T (0 == &a1[0]); // { dg-warning "-Waddress" }
T (s.a2[i] == 0); // { dg-warning "-Waddress" }
T (0 == &a2[i]); // { dg-warning "-Waddress" }
T (s.a2[0][0] == 0);
T (0 == &a2[0][0]); // { dg-warning "-Waddress" }
}
void test_member_array_neq_0 (int i)
{
// Verify that casts to intptr_t suppress the warning.
T ((uintptr_t)s.a1);
T (s.a1); // { dg-warning "-Waddress" }
T (&s.a1 != 0); // { dg-warning "-Waddress" }
T ((void *)&s.a1[0]); // { dg-warning "-Waddress" }
T (s.a1[0]);
T (&s.a1[0] != 0); // { dg-warning "-Waddress" }
T (s.a1[i]);
T (&s.a1[i] != 0); // { dg-warning "-Waddress" }
T ((intptr_t)s.a2);
T (s.a2); // { dg-warning "-Waddress" }
T (&s.a2 != 0); // { dg-warning "-Waddress" }
T (s.a2[0]); // { dg-warning "-Waddress" }
T (&s.a1[0] != 0); // { dg-warning "-Waddress" }
T (s.a2[i]); // { dg-warning "-Waddress" }
T (&s.a2[i] != 0); // { dg-warning "-Waddress" }
T (s.a2[0][0]);
T (&s.a2[0][0] != 0); // { dg-warning "-Waddress" }
}
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