-// Special g++ Options: -fno-strict-aliasing
-// Origin: Mark Mitchell <mark@codesourcery.com>
-
-/* Generally, the lowest bit of the ptr is used to indicate whether a
- ptr-to-mem-func points to a virtual or a non-virtual member
- function. However, some platforms use all bits to encode a
- function pointer. Such platforms use the lowest bit of the delta,
- that is shifted left by one bit. */
-#if defined __MN10300__ || defined __SH5__ || defined __arm__ || defined __thumb__ || defined __mips__
-#define ADJUST_PTRFN(func, virt) ((void (*)())(func))
-#define ADJUST_DELTA(delta, virt) (((delta) << 1) + !!(virt))
-#else
-#define ADJUST_PTRFN(func, virt) ((void (*)())((ptrdiff_t)(func) + !!(virt)))
-#define ADJUST_DELTA(delta, virt) (delta)
-#endif
-
-/* IA64 uses function descriptors instead of function pointers in its
- vtables, which means that we can't meaningfully compare them directly. */
-#if defined __ia64__
-#define CMP_PTRFN(A, B) (*(void **)(A) == *(void **)(B))
-#define VPTE_SIZE (16)
-#else
-#define CMP_PTRFN(A, B) ((A) == (B))
-#define VPTE_SIZE sizeof(void *)
-#endif
-
-#if defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100
-
-// Check that pointers-to-member functions are represented correctly.
-
-#include <cstddef>
-
-struct S
-{
- int i;
- int j;
-};
-
-// Because S does not have a VPTR, it will not be a primary base of T,
-// and will therefore end up at a non-zero offset.
-
-struct T : public S
-{
- void f () {}
- virtual void g () {}
- virtual void h () {}
-};
-
-// Provide access to the raw function pointers. This is
-// mangling-dependent.
-
-extern "C" void _ZN1T1fEv ();
-extern "C" void _ZN1T1gEv ();
-extern "C" void _ZN1T1hEv ();
-
-// This structure is a C representation of a pointer-to-member.
-
-struct ptrmemfunc
-{
- void (*ptr) ();
- ptrdiff_t adj;
-};
-
-typedef int S::*sdp;
-typedef void (S::*sp)();
-typedef void (T::*tp)();
-
-int
-main ()
-{
- S s;
- T t;
- sp x;
- tp y;
- ptrmemfunc *xp = (ptrmemfunc *) &x;
- ptrmemfunc *yp = (ptrmemfunc *) &y;
- ptrdiff_t delta = ((char *) &t) - ((char*) (S*) (&t));
-
- // Pointers-to-function-members should have the same size and
- // alignment as the PTRMEMFUNC type.
- if (sizeof (sp) != sizeof (ptrmemfunc))
- return 1;
- if (__alignof__ (sp) != __alignof__ (ptrmemfunc))
- return 2;
-
- // The NULL pointer-to-member should have a NULL first PTR field.
- x = 0;
- if (xp->ptr != 0)
- return 3;
- y = x;
- if (yp->ptr != 0)
- return 4;
-
- // A non-virtual function should have a pointer to the function.
- // There should be no adjustment for the `T' version, and an
- // appropriate adjustment for the `S' version.
- y = &T::f;
- if (! CMP_PTRFN (yp->ptr, ADJUST_PTRFN (&_ZN1T1fEv, 0)))
- return 5;
- if (yp->adj != ADJUST_DELTA (0, 0))
- return 6;
- x = (sp) y;
- if (! CMP_PTRFN (xp->ptr, ADJUST_PTRFN (&_ZN1T1fEv, 0)))
- return 7;
- if (xp->adj != ADJUST_DELTA (delta, 0))
- return 8;
-
- // For a virtual function, we should see the vtable offset, plus
- // one. `T::h' is in the second slot: the vtable pointer points to
- // the first virtual function.
- y = &T::h;
- if (yp->ptr != ADJUST_PTRFN (VPTE_SIZE, 1))
- return 9;
- if (yp->adj != ADJUST_DELTA (0, 1))
- return 10;
- x = (sp) y;
- if (xp->ptr != ADJUST_PTRFN (VPTE_SIZE, 1))
- return 11;
- if (xp->adj != ADJUST_DELTA (delta, 1))
- return 12;
-
- // Pointers-to-data-members should have the same size and alignment
- // as a ptrdiff_t.
- if (sizeof (sdp) != sizeof (ptrdiff_t))
- return 13;
- if (__alignof__ (sdp) != __alignof__ (ptrdiff_t))
- return 14;
-
- // The value of a pointer-to-data member should be the offset from
- // the start of the structure.
- sdp z = &S::j;
- if ((char *) &s.j - (char *) &s != *((ptrdiff_t *) &z))
- return 15;
- z = 0;
- if (*((ptrdiff_t *) &z) != -1)
- return 16;
-}
-
-#else /* !(defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100) */
-
-int main ()
-{
-}
-
-#endif /* !(defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100) */