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/* PR tree-optimization/101419 */
/* { dg-do compile } */
/* { dg-options "-O2" } */
typedef __SIZE_TYPE__ size_t;
void baz (int, int) __attribute__((__warning__("detected overflow")));
union U {
int i;
char c;
};
static void
foo (union U *u)
{
if (__builtin_object_size (&u->c, 1) < sizeof (u->c))
baz (__builtin_object_size (&u->c, 1), sizeof (u->c)); /* { dg-bogus "detected overflow" } */
__builtin_memset (&u->c, 0, sizeof (u->c));
if (__builtin_object_size (&u->i, 1) < sizeof (u->i))
baz (__builtin_object_size (&u->i, 1), sizeof (u->i)); /* { dg-bogus "detected overflow" } */
__builtin_memset (&u->i, 0, sizeof (u->i));
}
void
bar (union U *u)
{
int i, j;
for (i = 0; i < 1; i++)
{
foo (u);
for (j = 0; j < 2; j++)
asm volatile ("");
}
}
static void
qux (void *p, size_t q)
{
if (__builtin_object_size (p, 1) < q)
baz (__builtin_object_size (p, 1), q); /* { dg-bogus "detected overflow" } */
__builtin_memset (p, 0, q);
}
static void
corge (union U *u)
{
qux (&u->c, sizeof (u->c));
qux (&u->i, sizeof (u->i));
}
void
garply (union U *u)
{
int i, j;
for (i = 0; i < 1; i++)
{
corge (u);
for (j = 0; j < 2; j++)
asm volatile ("");
}
}
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