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/* PR tree-optimization/83075 - Invalid strncpy optimization */
/* { dg-do run } */
/* { dg-options "-O2 -Wstringop-overflow" } */
typedef __SIZE_TYPE__ size_t;
__attribute__((noipa)) size_t
foo (char *p, char *q, size_t *r)
{
size_t n0 = __builtin_strlen (p);
__builtin_strncat (q, p, n0); /* { dg-warning "specified bound depends on the length" } */
size_t n1 = __builtin_strlen (p);
*r = n0;
return n1;
}
int
main ()
{
char a[8] = "";
__builtin_strcpy (a, "123");
size_t n0 = __builtin_strlen (a);
__builtin_strncat (a + 3, a, n0); /* { dg-warning "specified bound depends on the length" } */
size_t n1 = __builtin_strlen (a);
if (n1 == n0)
__builtin_abort ();
a[6] = '7';
__builtin_strcpy (a, "456");
size_t n2;
if (foo (a, a + 3, &n2) != 6 || n2 != 3)
__builtin_abort ();
if (__builtin_memcmp (a, "456456\0", sizeof "456456\0"))
__builtin_abort ();
return 0;
}
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