https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105776
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #1) > The second one is a target issue. > For f3, widening multiple pass (which is misnamed these days) detects the > __builtin_mul_overflow for x86_64 but not for aarch64 even though the > incoming IR is the same. I will file it seperately, the problem there is umulv4/mulv4 patterns are not defined for aarch64.
