[Bug target/82274] __builtin_mul_overflow fails to detect overflow for int64_t when compiled with -m32

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82274

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Testcase that fails also on x86_64 -m64 (again, without optimizations only,
with optimizations we fold it at compile time):

int
main ()
{
#ifdef __SIZEOF_INT128__
  __int128 m = -(((__int128) 1) << (__CHAR_BIT__ * __SIZEOF_INT128__ / 2));
  __int128 r;
#else
  long long m = -(1LL << (__CHAR_BIT__ * __SIZEOF_LONG_LONG__ / 2));
  long long r;
#endif
  if (!__builtin_mul_overflow (m, m, &r))
    __builtin_abort ();
  return 0;
}