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/* Verify that our memset warnings don't crash when folding
arguments within a template (PR c++/83814). */
// { dg-options "-Wno-int-to-pointer-cast -Wmemset-transposed-args -Wmemset-elt-size" }
template <class>
void test_1()
{
__builtin_memset (int() - char(), 0, 0);
}
template <class>
void test_2()
{
__builtin_memset (0, 0, int() - char());
}
template <class>
void test_3 (unsigned a, int c)
{
__builtin_memset((char *)c + a, 0, a);
}
template <class>
void test_4 (unsigned a, int c)
{
__builtin_memset(0, 0, (char *)c + a);
}
/* Verify that we warn for -Wmemset-transposed-args inside
a template. */
char buf[1024];
template <class>
void test_5 ()
{
__builtin_memset (buf, sizeof buf, 0); // { dg-warning "transposed parameters" }
}
/* Adapted from c-c++-common/memset-array.c; verify that
-Wmemset-elt-size works within a template. */
enum a {
a_1,
a_2,
a_n
};
int t1[20];
int t2[a_n];
struct s
{
int t[20];
};
template<class>
void foo (struct s *s)
{
__builtin_memset (t1, 0, 20); // { dg-warning "element size" }
// This case requires reading through an enum value:
__builtin_memset (t2, 0, a_n); // { dg-warning "element size" }
__builtin_memset (s->t, 0, 20); // { dg-warning "element size" }
// These cases require folding of arg2 within a template:
__builtin_memset (t2, 0, a_n + 0); // { dg-warning "element size" }
__builtin_memset (t2, 0, a_n * 1); // { dg-warning "element size" }
}
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