Viewing file:  pr68106.c (1.08 KB) -rw-r--r--
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/* { dg-do run { target aarch64*-*-* } } */
/* { dg-options "-O" } */
typedef signed long long int S;
typedef unsigned long long int U;
typedef __int128 W;
__attribute__ ((noinline, noclone))
U upseu (U x, S y, int *ovf)
{
U res;
*ovf = __builtin_add_overflow (x, y, &res);
return res;
}
U
usueu (U x, U y, int *ovf)
{
U res;
*ovf = __builtin_sub_overflow (x, y, &res);
return res;
}
U
usseu (U x, S y, int *ovf)
{
U res;
*ovf = __builtin_sub_overflow (x, y, &res);
return res;
}
int
main ()
{
int i, j;
for (i = 0; i < ((unsigned char) ~0); i++)
for (j = 0; j < ((unsigned char) ~0); j++)
{
U u1 = ((W) i << ((8 - 1) * 8));
S s2 = ((W) j << ((8 - 1) * 8)) + (-0x7fffffffffffffffLL - 1);
U u2 = ((W) j << ((8 - 1) * 8));
W w;
int ovf;
w = ((W) u1) + ((W) s2);
if (upseu (u1, s2, &ovf) != (U) w || ovf != (w != (U) w))
__builtin_abort ();
w = ((W) u1) - ((W) u2);
if (usueu (u1, u2, &ovf) != (U) w || ovf != (w != (U) w))
__builtin_abort ();
w = ((W) u1) - ((W) s2);
if (usseu (u1, s2, &ovf) != (U) w || ovf != (w != (U) w))
__builtin_abort ();
}
}
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