Viewing file:  devirt-c-7.C (1.22 KB) -rw-r--r--
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/* Verify that ipa-cp will not get confused by placement new constructing an
object within another one when looking for dynamic type change . */
/* { dg-do run { target { nonpic || pie_enabled } } } */
/* { dg-options "-O3 -Wno-attributes" } */
extern "C" void abort (void);
namespace std {
typedef __SIZE_TYPE__ size_t;
}
inline void* __attribute__ ((always_inline))
operator new(std::size_t, void* __p) throw()
{
return __p;
}
class A
{
public:
char data[256];
A();
virtual int foo (int i);
};
class B : public A
{
public:
virtual int foo (int i);
};
class C
{
public:
C();
virtual double foo (double i);
};
int A::foo (int i)
{
return i + 1;
}
int B::foo (int i)
{
return i + 2;
}
double C::foo (double i)
{
return i + 3.5;
}
static int __attribute__ ((noinline)) middleman (class A *obj, int i)
{
return obj->foo (i);
}
int __attribute__ ((noinline,noclone)) get_input(void)
{
return 1;
}
__attribute__ ((always_inline)) C::C ()
{
}
A::A ()
{
}
static __attribute__ ((noinline)) void bah ()
{
class B b;
C *c = new ((void *) &b.data) C;
if (middleman (&b, get_input ()) != 3)
abort ();
}
int main (int argc, char *argv[])
{
int i;
for (i = 0; i < 10; i++)
bah ();
return 0;
}
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