https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95862
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Are you specifically talking about the case where r is unused afterwards, aka
about return __builtin_mul_overflow_p (a, b, (uint64_t) 0); ?
In that case, the overflow is only if a and b have different signs, aka.
(a ^ b) < 0.
